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CVE-2026-67236BIT-RABBITMQ-2026-67236GHSA-88VH-GX85-P36M

RabbitMQ: Plaintext username:password stored in an insecure cookie after successful POST /login

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 4.2.8, 4.3.2
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: partial

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • rabbitmq rabbitmq-server

    From 4.2.0 · fixed in 4.2.8; From 4.3.0 · fixed in 4.3.2

  • rabbitmqBitnami

    From 4.2.0 · fixed in 4.2.8; From 4.3.0 · fixed in 4.3.2

References 5

GitHub · rabbitmq/rabbitmq-server