CVE-2026-67231

RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0, The trust-store plugin installs a verify_fun that overrides {bad_cert, unknown_ca} / {bad_cert, selfsigned_peer} when the presented cert "matches" a whitelisted one. The match key is extract_issuer_id/1 → public_key:pkix_issuer_id/2 → {IssuerName, SerialNumber} , both fields are taken verbatim from the presented certificate body and contain no public-key, SKI, fingerprint or signature material. is_whitelisted/1 is a pure ets:member lookup; the stored full DER is used only for list/0 display and is never compared against the presented cert. cacerts is [], so the whitelisted cert is never used as a trust anchor for path validation either. TLS client-authentication bypass: an attacker who knows the issuer DN + serial of any whitelisted certificate can connect with a forged self-signed cert. Preconditions include rabbitmq_trust_store plugin enabled and used as the TLS verify_fun Attacker knows or can guess the {Issuer, Serial} of at least one whitelisted cert (non-secret; exposed via CLI/logs/any cert copy). This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0.

• CWE-295

• https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6
• https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.0
• https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-cw8c-4m83-9c6w

Published

Sep 23, 2026

Last Modified

Sep 24, 2026

Status

Awaiting Analysis

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-67225RabbitMQ is a messaging and streaming broker. From 3.13.0 un…6.3
• CVE-2026-67226RabbitMQ is a messaging and streaming broker. From 4.0.0 unt…6.9
• CVE-2026-67227RabbitMQ is a messaging and streaming broker. From 4.0.0 unt…5.9
• CVE-2026-67228RabbitMQ is a messaging and streaming broker. Prior to versi…6.9
• CVE-2026-67229RabbitMQ is a messaging and streaming broker. Prior to versi…6.9
• CVE-2026-67230RabbitMQ is a messaging and streaming broker. From 3.13.0 un…6.3
• CVE-2026-67232RabbitMQ is a messaging and streaming broker. Prior to versi…8.2
• CVE-2026-67233RabbitMQ is a messaging and streaming broker. Prior to versi…6
• CVE-2026-67234RabbitMQ is a messaging and streaming broker. From 4.2.0 unt…2.3
• CVE-2026-67235RabbitMQ is a messaging and streaming broker. Prior to versi…7.1
• CVE-2026-67236RabbitMQ is a messaging and streaming broker. From 4.2.0 unt…8.2
• CVE-2026-67237RabbitMQ is a messaging and streaming broker. From 4.2.0 unt…7.5