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VCID-1mgq-74b9-4bcg
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A client can trigger excessive memory allocation by generating a lot of errors responses over a single DoQ and DoH3 connection, as some resources were not properly released until the end of the connection.
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CVE-2026-33595
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VCID-3qce-a24m-yue1
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An attacker might be able to trigger an out-of-bounds write by sending crafted DNS responses to a DNSdist using the DNSQuestion:changeName or DNSResponse:changeName methods in custom Lua code. In some cases the rewritten packet might become larger than the initial response and even exceed 65535 bytes, potentially leading to a crash resulting in denial of service.
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CVE-2026-27853
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VCID-744k-b7s7-kbh5
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A rogue backend can send a crafted SVCB response to a Discovery of Designated Resolvers request, when requested via either the autoUpgrade (Lua) option to newServer or auto_upgrade (YAML) settings. DDR upgrade is not enabled by default.
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CVE-2026-33599
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VCID-7xds-447f-qufr
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A client might theoretically be able to cause a mismatch between queries sent to a backend and the received responses by sending a flood of perfectly timed queries that are routed to a TCP-only or DNS over TLS backend.
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CVE-2026-33596
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VCID-a65j-y7z3-fudk
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A rogue backend can send a crafted UDP response with a query ID off by one related to the maximum configured value, triggering an out-of-bounds write leading to a denial of service.
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CVE-2026-33602
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VCID-afun-gxhy-rbed
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A client can trigger a divide by zero error leading to crash by sending a crafted DNSCrypt query.
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CVE-2026-33593
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VCID-atx2-yc9p-g3c7
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An attacker might be able to trick DNSdist into allocating too much memory while processing DNS over QUIC or DNS over HTTP/3 payloads, resulting in a denial of service. In setups with a large quantity of memory available this usually results in an exception and the QUIC connection is properly closed, but in some cases the system might enter an out-of-memory state instead and terminate the process.
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CVE-2026-24030
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VCID-c7az-aw1f-4yah
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When the early_acl_drop (earlyACLDrop in Lua) option is disabled (default is enabled) on a DNS over HTTPs frontend using the nghttp2 provider, the ACL check is skipped, allowing all clients to send DoH queries regardless of the configured ACL.
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CVE-2026-24029
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VCID-chzq-qej6-rkdq
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An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.
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CVE-2026-33257
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VCID-fbsf-bbw7-kyah
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PRSD detection denial of service
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CVE-2026-33597
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VCID-gx8g-nvhj-1kak
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When the internal webserver is enabled (default is disabled), an attacker might be able to trick an administrator logged to the dashboard into visiting a malicious website and extract information about the running configuration from the dashboard. The root cause of the issue is a misconfiguration of the Cross-Origin Resource Sharing (CORS) policy.
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CVE-2026-0397
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VCID-nrex-hpxg-ekhs
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A client can trigger excessive memory allocation by generating a lot of queries that are routed to an overloaded DoH backend, causing queries to accumulate into a buffer that will not be released until the end of the connection.
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CVE-2026-33594
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VCID-pfhu-1qdf-p7d5
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An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.
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CVE-2026-33260
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VCID-qc7c-1d8j-hfha
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A cached crafted response can cause an out-of-bounds read if custom Lua code calls getDomainListByAddress() or getAddressListByDomain() on a packet cache.
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CVE-2026-33598
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VCID-rf53-w9k3-7ych
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An attacker might be able to trigger an out-of-bounds read by sending a crafted DNS response packet, when custom Lua code uses newDNSPacketOverlay to parse DNS packets. The out-of-bounds read might trigger a crash, leading to a denial of service, or access unrelated memory, leading to potential information disclosure.
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CVE-2026-24028
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VCID-szpa-skfv-bygh
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An attacker might be able to trigger a use-after-free by sending crafted DNS queries to a DNSdist using the DNSQuestion:getEDNSOptions method in custom Lua code. In some cases DNSQuestion:getEDNSOptions might refer to a version of the DNS packet that has been modified, thus triggering a use-after-free and potentially a crash resulting in denial of service.
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CVE-2026-27854
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VCID-x5p9-vthx-tud8
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An attacker might be able to inject HTML content into the internal web dashboard by sending crafted DNS queries to a DNSdist instance where domain-based dynamic rules have been enabled via either DynBlockRulesGroup:setSuffixMatchRule or DynBlockRulesGroup:setSuffixMatchRuleFFI.
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CVE-2026-0396
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VCID-ytdy-s1ug-dkh7
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An attacker can create a large number of concurrent DoQ or DoH3 connections, causing unlimited memory allocation in DNSdist and leading to a denial of service. DOQ and DoH3 are disabled by default.
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CVE-2026-33254
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