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🚨 CVE-2026-33612
A malicious authoritative server can send a crafted zone via the ZoneToCache function that leads to cache poisoning.

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🚨 CVE-2026-40011
An attacker sending a large number of crafted DNS queries might be able to trigger a dynamic block being inserted with a value causing invalid output to be produced in the prometheus endpoint. The prometheus endpoint will then be rejected by the scraper until the dynamic block expires.

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🚨 CVE-2026-40208
An attacker might be able to delay the processing of DoH3 queries by sending DoH3 GET queries with an invalid DATA frame.

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🚨 CVE-2026-40210
An out-of-bounds read might happen when SetMacAddrAction is used, potentially resulting in uninitialized memory being sent over the network or a crash.

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🚨 CVE-2026-40211
An attacker can send crafted DNS over HTTP/3 queries, triggering an exception that prevents some buffer from being freed right away. The buffer will be freed at the end of the QUIC connection, but on some setups it might be possible to open enough concurrent DoH3 streams to trigger an out-of-memory condition, resulting in a denial of service.

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🚨 CVE-2026-42004
An attacker can send a crafted EDNS OPT record that will be ignored by DNSdist’s filtering rules, but will be rewritten as a valid OPT record when EDNS Client Subnet is inserted, causing the backend to see the EDNS option(s) that DNSdist did not filter.

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🚨 CVE-2026-12755
Improper input validation in the PAM AD discovery endpoints in
Devolutions Server 2026.2.4.0 through 2026.2.7.0 allows an authenticated
user with the UserGroupsView permission to coerce server-side
authentication to an attacker-controlled host, exposing PAM provider
credentials as a NTLMv2 challenge-response, via a crafted DomainName
parameter.

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🚨 CVE-2026-40012
ECS zero scoped answers are stored in the packet cache while they should not. This impacts only configurations that have ECS enabled;

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🚨 CVE-2026-42387
A malicious authoritative server can send a crafted zone via the ZoneToCache function that leads to a crash of the Recursor due to insuffcient input validation.

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🚨 CVE-2026-42388
Incomplete validation of the SOA record present in a catalog zone might lead to a crash.

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🚨 CVE-2026-42389
This fix provides extra hardening for the 5.4.x branch by doing extra validation of incoming answers from authoritative servers.

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🚨 CVE-2026-42390
An invalid zone might pass ZONEMD validation while it should not. This is only relevant if ZoneToCache is configured with ZONEMD validation.

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🚨 CVE-2026-52690
Spoofing replies to Recursor might mark an IP of an authoritative server as not supporting EDNS, causing valdiation of DNSSEC records served by that server to fail.

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