CVE-2026-5740 - Unauthenticated WebSocket binary frame causes denial of service in Mattermost Server
CVE ID :CVE-2026-5740
Published : May 22, 2026, 10:22 a.m. | 3 hours, 21 minutes ago
Description :Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to properly validate msgpack-encoded WebSocket frames before memory allocation which allows an unauthenticated remote attacker to crash the server process and cause a full service outage for all users via a crafted binary WebSocket message sent to the public WebSocket endpoint.. Mattermost Advisory ID: MMSA-2026-00647
Severity: 7.5 | HIGH
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CVE ID :CVE-2026-5740
Published : May 22, 2026, 10:22 a.m. | 3 hours, 21 minutes ago
Description :Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to properly validate msgpack-encoded WebSocket frames before memory allocation which allows an unauthenticated remote attacker to crash the server process and cause a full service outage for all users via a crafted binary WebSocket message sent to the public WebSocket endpoint.. Mattermost Advisory ID: MMSA-2026-00647
Severity: 7.5 | HIGH
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CVE-2026-3636 - Sanitize team member data returned by API
CVE ID :CVE-2026-3636
Published : May 22, 2026, 10:23 a.m. | 3 hours, 20 minutes ago
Description :Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to sanitize team member data when returned via API to users without elevated permissions which allows a user without permissions to get data about team members roles via invoking various team API endpoints.. Mattermost Advisory ID: MMSA-2026-00626
Severity: 4.3 | MEDIUM
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CVE ID :CVE-2026-3636
Published : May 22, 2026, 10:23 a.m. | 3 hours, 20 minutes ago
Description :Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to sanitize team member data when returned via API to users without elevated permissions which allows a user without permissions to get data about team members roles via invoking various team API endpoints.. Mattermost Advisory ID: MMSA-2026-00626
Severity: 4.3 | MEDIUM
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CVE-2026-4646 - Insufficient input validation in GitHub plugin API causes denial of service
CVE ID :CVE-2026-4646
Published : May 22, 2026, 10:25 a.m. | 3 hours, 18 minutes ago
Description :Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to validate user-supplied input in API request handlers which allows an authenticated attacker to crash the plugin process via a crafted HTTP request to the PR details endpoint.. Mattermost Advisory ID: MMSA-2026-00638
Severity: 4.3 | MEDIUM
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CVE ID :CVE-2026-4646
Published : May 22, 2026, 10:25 a.m. | 3 hours, 18 minutes ago
Description :Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to validate user-supplied input in API request handlers which allows an authenticated attacker to crash the plugin process via a crafted HTTP request to the PR details endpoint.. Mattermost Advisory ID: MMSA-2026-00638
Severity: 4.3 | MEDIUM
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CVE-2026-3473 - Improper file ownership validation in the Boards API allows unauthorised file access
CVE ID :CVE-2026-3473
Published : May 22, 2026, 10:27 a.m. | 3 hours, 16 minutes ago
Description :Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to validate file ownership and access control, which allows an authenticated user to access and download files belonging to other users or teams via crafted Boards API requests using valid file IDs.. Mattermost Advisory ID: MMSA-2026-00620
Severity: 5.9 | MEDIUM
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CVE ID :CVE-2026-3473
Published : May 22, 2026, 10:27 a.m. | 3 hours, 16 minutes ago
Description :Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to validate file ownership and access control, which allows an authenticated user to access and download files belonging to other users or teams via crafted Boards API requests using valid file IDs.. Mattermost Advisory ID: MMSA-2026-00620
Severity: 5.9 | MEDIUM
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CVE-2026-4635 - Persistent notification timing attack causing server denial of service
CVE ID :CVE-2026-4635
Published : May 22, 2026, 10:28 a.m. | 3 hours, 14 minutes ago
Description :Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to archive the channel before removing persistent notifications which allows authenticated user to crash the server via timing the creation of persistent notification message between the server deleting existing persistent notifications and archiving the channel.. Mattermost Advisory ID: MMSA-2026-00637
Severity: 6.5 | MEDIUM
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CVE ID :CVE-2026-4635
Published : May 22, 2026, 10:28 a.m. | 3 hours, 14 minutes ago
Description :Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to archive the channel before removing persistent notifications which allows authenticated user to crash the server via timing the creation of persistent notification message between the server deleting existing persistent notifications and archiving the channel.. Mattermost Advisory ID: MMSA-2026-00637
Severity: 6.5 | MEDIUM
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CVE-2026-44930 - Apache CXF: LDAP Injection vulnerability in XKMS LDAP Repository
CVE ID :CVE-2026-44930
Published : May 22, 2026, 12:16 p.m. | 1 hour, 26 minutes ago
Description :An LDAP injection vulnerability in the LDAP Certificate repository of the XKMS server in Apache CXF may allow an attacker to retrieve arbitrary certificates from the repository. Users are recommended to upgrade to versions 4.2.1, 4.1.6 or 3.6.11, which fix this issue.
Severity: 0.0 | NA
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CVE ID :CVE-2026-44930
Published : May 22, 2026, 12:16 p.m. | 1 hour, 26 minutes ago
Description :An LDAP injection vulnerability in the LDAP Certificate repository of the XKMS server in Apache CXF may allow an attacker to retrieve arbitrary certificates from the repository. Users are recommended to upgrade to versions 4.2.1, 4.1.6 or 3.6.11, which fix this issue.
Severity: 0.0 | NA
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CVE-2026-44618 - Apache CXF: XXE vulnerability in WS-Transfer functionality
CVE ID :CVE-2026-44618
Published : May 22, 2026, 12:17 p.m. | 1 hour, 26 minutes ago
Description :Insecure XML parser configuration in Apache CXF's WS-Transfer module may allow attackers to perform XXE attacks. Users are recommended to upgrade to versions 4.2.1, 4.1.6 or 3.6.11, which fix this issue.
Severity: 0.0 | NA
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CVE ID :CVE-2026-44618
Published : May 22, 2026, 12:17 p.m. | 1 hour, 26 minutes ago
Description :Insecure XML parser configuration in Apache CXF's WS-Transfer module may allow attackers to perform XXE attacks. Users are recommended to upgrade to versions 4.2.1, 4.1.6 or 3.6.11, which fix this issue.
Severity: 0.0 | NA
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CVE-2026-44417 - Apache CXF: Incomplete fix for CVE-2025-48913 (Untrusted JMS configuration can lead to RCE)
CVE ID :CVE-2026-44417
Published : May 22, 2026, 12:17 p.m. | 1 hour, 26 minutes ago
Description :The fix for CVE-2025-48913: Apache CXF: Untrusted JMS configuration can lead to RCE was not complete, meaning that another path in the code might lead to code execution capabilities, if untrusted users are allowed to configure JMS for Apache CXF. Users are recommended to upgrade to versions 4.2.1, 4.1.6 or 3.6.11, which fix this issue.
Severity: 0.0 | NA
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CVE ID :CVE-2026-44417
Published : May 22, 2026, 12:17 p.m. | 1 hour, 26 minutes ago
Description :The fix for CVE-2025-48913: Apache CXF: Untrusted JMS configuration can lead to RCE was not complete, meaning that another path in the code might lead to code execution capabilities, if untrusted users are allowed to configure JMS for Apache CXF. Users are recommended to upgrade to versions 4.2.1, 4.1.6 or 3.6.11, which fix this issue.
Severity: 0.0 | NA
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CVE-2026-42506 - Invoking incorrect handling of namespaced elements in foreign content in golang.org/x/net/html
CVE ID :CVE-2026-42506
Published : May 22, 2026, 3:01 p.m. | 2 hours, 43 minutes ago
Description :Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.
Severity: 0.0 | NA
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CVE ID :CVE-2026-42506
Published : May 22, 2026, 3:01 p.m. | 2 hours, 43 minutes ago
Description :Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.
Severity: 0.0 | NA
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CVE-2026-39821 - Invoking failure to reject ASCII-only Punycode-encoded labels in golang.org/x/net/idna
CVE ID :CVE-2026-39821
Published : May 22, 2026, 3:01 p.m. | 2 hours, 43 minutes ago
Description :The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label. For example, ToUnicode("xn--example-.com") incorrectly returns the name "example.com" rather than an error. This behavior can lead to privilege escalation in programs using the idna package. For example, a program which performs privilege checks on the ASCII hostname may reject "example.com" but permit "xn--example-.com". If that program subsequently converts the ASCII hostname to Unicode, it will inadvertently permits access to the Unicode name "example.com".
Severity: 0.0 | NA
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CVE ID :CVE-2026-39821
Published : May 22, 2026, 3:01 p.m. | 2 hours, 43 minutes ago
Description :The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label. For example, ToUnicode("xn--example-.com") incorrectly returns the name "example.com" rather than an error. This behavior can lead to privilege escalation in programs using the idna package. For example, a program which performs privilege checks on the ASCII hostname may reject "example.com" but permit "xn--example-.com". If that program subsequently converts the ASCII hostname to Unicode, it will inadvertently permits access to the Unicode name "example.com".
Severity: 0.0 | NA
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CVE-2026-42502 - Invoking incorrect handling of HTML elements in foreign content in golang.org/x/net/html
CVE ID :CVE-2026-42502
Published : May 22, 2026, 3:01 p.m. | 2 hours, 43 minutes ago
Description :Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.
Severity: 0.0 | NA
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CVE ID :CVE-2026-42502
Published : May 22, 2026, 3:01 p.m. | 2 hours, 43 minutes ago
Description :Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.
Severity: 0.0 | NA
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CVE-2026-25680 - Invoking denial of service when parsing arbitrary HTML in golang.org/x/net/html
CVE ID :CVE-2026-25680
Published : May 22, 2026, 3:01 p.m. | 2 hours, 43 minutes ago
Description :Parsing arbitrary HTML can consume excessive CPU time, possibly leading to denial of service.
Severity: 0.0 | NA
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CVE ID :CVE-2026-25680
Published : May 22, 2026, 3:01 p.m. | 2 hours, 43 minutes ago
Description :Parsing arbitrary HTML can consume excessive CPU time, possibly leading to denial of service.
Severity: 0.0 | NA
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CVE-2026-25681 - Invoking incorrect handling of character references in DOCTYPE nodes in golang.org/x/net/html
CVE ID :CVE-2026-25681
Published : May 22, 2026, 3:01 p.m. | 2 hours, 43 minutes ago
Description :Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.
Severity: 0.0 | NA
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CVE ID :CVE-2026-25681
Published : May 22, 2026, 3:01 p.m. | 2 hours, 43 minutes ago
Description :Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.
Severity: 0.0 | NA
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CVE-2026-27136 - Invoking duplicate attributes can cause XSS in golang.org/x/net/html
CVE ID :CVE-2026-27136
Published : May 22, 2026, 3:01 p.m. | 2 hours, 43 minutes ago
Description :Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.
Severity: 0.0 | NA
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CVE ID :CVE-2026-27136
Published : May 22, 2026, 3:01 p.m. | 2 hours, 43 minutes ago
Description :Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.
Severity: 0.0 | NA
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CVE-2026-9047 - Devolutions Server MFA Bypass Vulnerability
CVE ID :CVE-2026-9047
Published : May 22, 2026, 3:18 p.m. | 2 hours, 26 minutes ago
Description :Improper handling of factor key state in the multi-factor authentication management feature in Devolutions Server allows an attacker with knowledge of a user's password to bypass the user's multi-factor authentication after the user reconfigures their factors. This issue affects : * Devolutions Server 2026.1.6.0 through 2026.1.16.0
Severity: 0.0 | NA
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CVE ID :CVE-2026-9047
Published : May 22, 2026, 3:18 p.m. | 2 hours, 26 minutes ago
Description :Improper handling of factor key state in the multi-factor authentication management feature in Devolutions Server allows an attacker with knowledge of a user's password to bypass the user's multi-factor authentication after the user reconfigures their factors. This issue affects : * Devolutions Server 2026.1.6.0 through 2026.1.16.0
Severity: 0.0 | NA
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CVE-2026-9223 - Devolutions Server Authentication Bypass
CVE ID :CVE-2026-9223
Published : May 22, 2026, 3:21 p.m. | 2 hours, 23 minutes ago
Description :Missing authorization in the vault import feature in Devolutions Server 2026.1.16.0 and earlier allows a low-privileged authenticated user to create new vaults via a crafted import request.
Severity: 0.0 | NA
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CVE ID :CVE-2026-9223
Published : May 22, 2026, 3:21 p.m. | 2 hours, 23 minutes ago
Description :Missing authorization in the vault import feature in Devolutions Server 2026.1.16.0 and earlier allows a low-privileged authenticated user to create new vaults via a crafted import request.
Severity: 0.0 | NA
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CVE-2026-9248 - Devolutions Server Authorization Bypass Vulnerability
CVE ID :CVE-2026-9248
Published : May 22, 2026, 3:22 p.m. | 2 hours, 22 minutes ago
Description :Authorization bypass in the entry duplication feature in Devolutions Server allows an authenticated user with write access to any vault to copy documentation and attachments from an entry in a vault they cannot access via a crafted save request. This issue affects : * Devolutions Server 2026.1.6.0 through 2026.1.16.0 * Devolutions Server 2025.3.20.0 and earlier
Severity: 0.0 | NA
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CVE ID :CVE-2026-9248
Published : May 22, 2026, 3:22 p.m. | 2 hours, 22 minutes ago
Description :Authorization bypass in the entry duplication feature in Devolutions Server allows an authenticated user with write access to any vault to copy documentation and attachments from an entry in a vault they cannot access via a crafted save request. This issue affects : * Devolutions Server 2026.1.6.0 through 2026.1.16.0 * Devolutions Server 2025.3.20.0 and earlier
Severity: 0.0 | NA
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CVE-2026-9247 - Devolutions Server Insufficient Logging (Information Disclosure)
CVE ID :CVE-2026-9247
Published : May 22, 2026, 3:23 p.m. | 2 hours, 21 minutes ago
Description :Insufficient logging in the entry export feature in Devolutions Server allows an authenticated user with export permissions to export a sealed entry without triggering the unseal notification to administrators via a crafted export request. This issue affects : * Devolutions Server 2026.1.6.0 through 2026.1.16.0 * Devolutions Server 2025.3.20.0 and earlier
Severity: 0.0 | NA
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CVE ID :CVE-2026-9247
Published : May 22, 2026, 3:23 p.m. | 2 hours, 21 minutes ago
Description :Insufficient logging in the entry export feature in Devolutions Server allows an authenticated user with export permissions to export a sealed entry without triggering the unseal notification to administrators via a crafted export request. This issue affects : * Devolutions Server 2026.1.6.0 through 2026.1.16.0 * Devolutions Server 2025.3.20.0 and earlier
Severity: 0.0 | NA
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CVE-2026-9245 - Devolutions Server Open Redirect Vulnerability
CVE ID :CVE-2026-9245
Published : May 22, 2026, 3:24 p.m. | 2 hours, 20 minutes ago
Description :Improper input validation in the external authentication provider flow in Devolutions Server allows an unauthenticated remote attacker to redirect victims to an attacker-controlled domain via a crafted login link. This issue affects : * Devolutions Server 2026.1.6.0 through 2026.1.16.0 * Devolutions Server 2025.3.20.0 and earlier
Severity: 0.0 | NA
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CVE ID :CVE-2026-9245
Published : May 22, 2026, 3:24 p.m. | 2 hours, 20 minutes ago
Description :Improper input validation in the external authentication provider flow in Devolutions Server allows an unauthenticated remote attacker to redirect victims to an attacker-controlled domain via a crafted login link. This issue affects : * Devolutions Server 2026.1.6.0 through 2026.1.16.0 * Devolutions Server 2025.3.20.0 and earlier
Severity: 0.0 | NA
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CVE-2026-9249 - Devolutions Server Unverified Password Change Vulnerability
CVE ID :CVE-2026-9249
Published : May 22, 2026, 3:24 p.m. | 2 hours, 20 minutes ago
Description :Unverified password change in Devolutions Server allows an attacker to change a user's password without providing the previous one via a crafted password change request. This issue affects : * Devolutions Server 2026.1.6.0 through 2026.1.16.0 * Devolutions Server 2025.3.20.0 and earlier
Severity: 0.0 | NA
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CVE ID :CVE-2026-9249
Published : May 22, 2026, 3:24 p.m. | 2 hours, 20 minutes ago
Description :Unverified password change in Devolutions Server allows an attacker to change a user's password without providing the previous one via a crafted password change request. This issue affects : * Devolutions Server 2026.1.6.0 through 2026.1.16.0 * Devolutions Server 2025.3.20.0 and earlier
Severity: 0.0 | NA
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CVE-2026-9224 - Devolutions Server Unauthenticated Active Directory User Profile Update
CVE ID :CVE-2026-9224
Published : May 22, 2026, 3:25 p.m. | 2 hours, 19 minutes ago
Description :Missing authorization in the user profile update feature in Devolutions Server allows an authenticated Active Directory user to modify their own profile attributes via a crafted API request. This issue affects : * Devolutions Server 2026.1.6.0 through 2026.1.16.0 * Devolutions Server 2025.3.20.0 and earlier
Severity: 0.0 | NA
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CVE ID :CVE-2026-9224
Published : May 22, 2026, 3:25 p.m. | 2 hours, 19 minutes ago
Description :Missing authorization in the user profile update feature in Devolutions Server allows an authenticated Active Directory user to modify their own profile attributes via a crafted API request. This issue affects : * Devolutions Server 2026.1.6.0 through 2026.1.16.0 * Devolutions Server 2025.3.20.0 and earlier
Severity: 0.0 | NA
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