CVE-2026-67231— RabbitMQ: Trust-store whitelist by Issuer+Serial only
Quick assessment
Affected
rabbitmq rabbitmq-server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
RabbitMQ 是一个消息和流式代理软件。在 3.13.15、4.0.20、4.1.11、4.2.6 和 4.3.0 版本之前，trust-store 插件安装了一个 函数，该函数会在传入的证书与白名单中的证书“匹配”时，覆盖 / 错误。匹配键由 提取，该函数调用 ，返回 ，其中两个字段都直接从传入的证书主体中获取，不包含公钥、SKI、指纹或签名信息。 函数仅执行 查找；存储的完整 DER 格式数据仅用于 显示，并不与传入的证书进行比较。 为空，因此白名单中的证书从未被用作路径验证的信任锚。TLS 客户端身份验证
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I. Basic Information for CVE-2026-67231
Vulnerability Information
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Vulnerability Title
RabbitMQ: Trust-store whitelist by Issuer+Serial only
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| rabbitmq | rabbitmq-server | >= 3.13.0, < 3.13.15 | - |
|
II. Public POCs for CVE-2026-67231
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Pages for CVE-2026-67231 (1)
Other References for CVE-2026-67231 (2)
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Release RabbitMQ 4.3.0 · rabbitmq/rabbitmq-server · GitHub x_refsource_MISC
Same Patch Batch · rabbitmq · 2026-09-23 · 25 CVEs total
| CVE-2026-67404 | 9.2 CRITICAL | RabbitMQ: OAuth2 silent verify_none fallback for JWKS fetch |
| CVE-2026-67232 | 8.2 HIGH | RabbitMQ: Web-MQTT decompression bomb |
| CVE-2026-66079 | 8.2 HIGH | RabbitMQ: Pre-auth AMQP 1.0 array32 zero-width element DoS |
| CVE-2026-66070 | 7.6 HIGH | RabbitMQ: CORS * reflects Origin with Allow-Credentials |
| CVE-2026-66077 | 7.3 HIGH | RabbitMQ: Stored XSS via TLS peer-certificate DN in management UI |
| CVE-2026-67235 | 7.1 HIGH | RabbitMQ: AMQP 0-9-1 body assembly never validates accumulated size |
| CVE-2026-67238 | 7.1 HIGH | RabbitMQ: Atom-table exhaustion via reply-to queue name decoding |
| CVE-2026-67229 | 6.9 MEDIUM | RabbitMQ: Admin-only atom exhaustion: atomize_keys on vhost metadata |
| CVE-2026-67228 | 6.9 MEDIUM | RabbitMQ: Atom exhaustion: to_atom on runtime-parameter component |
| CVE-2026-66072 | 6.0 MEDIUM | RabbitMQ: Atom table exhaustion via stream `chunk_selector` |
| CVE-2026-66074 | 6.0 MEDIUM | RabbitMQ: ReDoS via management API ?name= filter |
| CVE-2026-66067 | 6.0 MEDIUM | RabbitMQ: Stream protocol skips per vhost per user connection limits |
| CVE-2026-67220 | 6.0 MEDIUM | RabbitMQ: JMS topic exchange erl_scan atom exhaustion |
| CVE-2026-67219 | 6.0 MEDIUM | RabbitMQ: Consistent-hash exchange unbounded weight |
| CVE-2026-67221 | 5.9 MEDIUM | RabbitMQ: AMQP 1.0 shovel status exposes plaintext URI passwords |
| CVE-2026-66080 | 5.9 MEDIUM | RabbitMQ: Super-stream partitions unbounded allocation |
| CVE-2026-66068 | 5.6 MEDIUM | RabbitMQ: Shovel DEBUG log of full state exposes decrypted URIs |
| CVE-2026-67405 | 5.3 MEDIUM | RabbitMQ: CSWSH on Web-STOMP / Web-MQTT (no Origin validation) |
| CVE-2026-66069 | 2.3 LOW | RabbitMQ: Monitoring-tag DELETE of auth-attempt metrics |
| CVE-2026-66076 | 2.3 LOW | RabbitMQ: Cross-vhost quorum-queue status and stream tracking disclosure |
Showing top 20 of 25 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
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CVE-2026-67420
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CVE-2026-67408
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CVE-2026-67406
RabbitMQ: Federation and Shovel Gen-Servers Lack format_stat
Same vendor: rabbitmq
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CVE-2026-67420
RabbitMQ OAuth credential refresh retains revoked runtime ta -
CVE-2026-67419
RabbitMQ: Consecutive topic wildcards cause combinatorial ro -
CVE-2026-67421
RabbitMQ: Stored HTML Injection in RabbitMQ Management OAuth -
CVE-2026-67408
RabbitMQ: Stream Management Super-Stream Binding Keys Alloca -
CVE-2026-67406
RabbitMQ: Federation and Shovel Gen-Servers Lack format_stat
Same weakness: CWE-295
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CVE-2026-89135
Failed X509_verify_cert leaves unverified CA in shared CertM -
CVE-2026-93302
Trusted peer certificate match ignores public key, allowing
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