CVE-2026-44236
highrabbitmq-c is a C-language AMQP client library for RabbitMQ.
rabbitmq-c is a C-language AMQP client library for RabbitMQ. Prior to 0.16.0, a malicious AMQP server can send an undersized connection.tune.frame_max value during amqp_login(), and rabbitmq-c accepts the value in amqp_login_inner() in librabbitmq/amqp_socket.c. amqp_tune_connection() in librabbitmq/amqp_connection.c uses frame_max to reallocate the outbound buffer without enforcing AMQP_FRAME_MIN_SIZE. Immediate serialization of connection.tune-ok through amqp_frame_to_bytes() writes beyond the undersized heap allocation, causing memory corruption and likely denial of service. An on-path attacker can also trigger the flaw against plaintext AMQP traffic. Code execution is theoretically possible but was not demonstrated. This issue is fixed in version 0.16.0.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/alanxz/rabbitmq-c/commit/4777d0b5c58cb02966a04a85832436bd66ed5d1f security-advisories@github.com
- https://github.com/alanxz/rabbitmq-c/pull/879 security-advisories@github.com
- https://github.com/alanxz/rabbitmq-c/releases/tag/v0.16.0 security-advisories@github.com
- https://github.com/alanxz/rabbitmq-c/security/advisories/GHSA-jh48-qjf5-fx5v security-advisories@github.com
- https://github.com/alanxz/rabbitmq-c/security/advisories/GHSA-jh48-qjf5-fx5v 134c704f-9b21-4f2e-91b3-4a467353bcc0