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CVE-2026-67236

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

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
rabbitmq / rabbitmq-serveraffected >= 4.2.0, < 4.2.8; affected >= 4.3.0, < 4.3.2

CWE

CWE-312

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.