CVE-2026-67236— RabbitMQ: Plaintext username:password stored in an insecure cookie after successful POST /login
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 是一个消息和流式处理代理。从 4.2.0 到 4.2.8 以及 4.3.2 版本之前，成功执行 POST /login 请求会导致 is_authorized/2 函数设置一个包含 base64 编码的 username:password 凭据的认证 cookie，但缺少 HttpOnly、Secure、SameSite 或过期保护属性。由于 base64 是一种编码方式而非加密方式，拥有同源跨站脚本攻击（XSS）能力、能够读取 HTTP 流量的网络位置权限，或者能够本地访问浏览器 cookie
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I. Basic Information for CVE-2026-67236
Vulnerability Information
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Vulnerability Title
RabbitMQ: Plaintext username:password stored in an insecure cookie after successful POST /login
Source: CVE Program / CVE List V5
Vulnerability Description
RabbitMQ is a messaging and streaming broker. From 4.2.0 until 4.2.8 and 4.3.2, a successful POST /login caused is_authorized/2 to set an auth cookie containing base64-encoded username:password credentials without HttpOnly, Secure, SameSite, or expiration protections. Because base64 is encoding rather than encryption, an attacker with same-origin cross-site scripting, an HTTP-readable network position, or local access to the browser cookie store could recover the actual login credentials; older browsers that treated an absent SameSite attribute as None also sent the cookie cross-site. This issue is fixed in versions 4.2.8 and 4.3.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
敏感数据的明文存储
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| rabbitmq | rabbitmq-server | >= 4.2.0, < 4.2.8 | - |
|
II. Public POCs for CVE-2026-67236
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-67236 (5)
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https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.8 x_refsource_MISC
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https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.2 x_refsource_MISC
Same Patch Batch · rabbitmq · 2026-09-25 · 28 CVEs total
| CVE-2026-67409 | 8.2 HIGH | RabbitMQ: JWKS Fetch Ignores HTTP Response Status Code - Signing Key Destruction Causes Au |
| CVE-2026-67410 | 8.2 HIGH | RabbitMQ: OAuth2 Client Secret Exposed via Unauthenticated JavaScript Endpoint |
| CVE-2026-67239 | 7.6 HIGH | RabbitMQ: Stored XSS via TLS peer-certificate DN in stream-management UI |
| CVE-2026-67237 | 7.5 HIGH | RabbitMQ: Reflected XSS via the OAuth bootstrap JS endpoint |
| CVE-2026-67408 | 7.1 HIGH | RabbitMQ: Stream Management Super-Stream Binding Keys Allocation Allows Low-Privilege Node |
| CVE-2026-67419 | 7.1 HIGH | RabbitMQ: Consecutive topic wildcards cause combinatorial routing work |
| CVE-2026-67226 | 6.9 MEDIUM | RabbitMQ: Admin-only atom exhaustion: PUT /api/users tags list |
| CVE-2026-61837 | 6.3 MEDIUM | RabbitMQ: AMQP 1.0 management `GET /bindings` exposes full binding topology to any authent |
| CVE-2026-67242 | 6.3 MEDIUM | RabbitMQ: OAuth2 is_integer(Exp) guard skips token-expiry checks for float exp |
| CVE-2026-67230 | 6.3 MEDIUM | RabbitMQ: Web-STOMP unbounded pre-auth accumulation |
| CVE-2026-67223 | 6.3 MEDIUM | RabbitMQ: LDAP DN injection via unescaped substitution |
| CVE-2026-67225 | 6.3 MEDIUM | RabbitMQ: Stream-protocol frame length never validated against frame_max |
| CVE-2026-66073 | 6.0 MEDIUM | RabbitMQ: Atom table exhaustion via management API node field |
| CVE-2026-66071 | 6.0 MEDIUM | RabbitMQ: Atom exhaustion: OAuth2 JWT tag: scope values |
| CVE-2026-67413 | 6.0 MEDIUM | RabbitMQ: Authenticated RabbitMQ JMS Topic Selector Users Can Consume Broker CPU with an U |
| CVE-2026-67412 | 6.0 MEDIUM | RabbitMQ: Federation upstream skips vhost authorization allowing cross-vhost message acces |
| CVE-2026-67411 | 6.0 MEDIUM | RabbitMQ: Web MQTT with PROXY Protocol enabled: a loopback-only user permission bypass |
| CVE-2026-67222 | 5.9 MEDIUM | RabbitMQ: list_to_atom on auth_mechanism URI tokens in amqp_client |
| CVE-2026-67227 | 5.9 MEDIUM | RabbitMQ: Atom exhaustion: to_atom on global-parameter :name |
| CVE-2026-67415 | 5.9 MEDIUM | RabbitMQ: Shovel Management Atom Exhaustion Allows Persistent Broker-Wide Denial of Servic |
Showing top 20 of 28 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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RabbitMQ OAuth credential refresh retains revoked runtime ta -
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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-312
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sfturing hosp_order CommonUserServiceImpl.java cleartext sto -
CVE-2026-77250
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