CVE-2026-44236

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 v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/alanxz/rabbitmq-c/commit/4777d0b5c58cb02966a04a85832436bd66ed5d1f
https://github.com/alanxz/rabbitmq-c/pull/879
https://github.com/alanxz/rabbitmq-c/releases/tag/v0.16.0
https://github.com/alanxz/rabbitmq-c/security/advisories/GHSA-jh48-qjf5-fx5v

Configurations

No configuration.

History

17 Sep 2026, 18:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-17 18:16

Updated : 2026-09-17 18:16

NVD link : CVE-2026-44236

Mitre link : CVE-2026-44236

CVE.ORG link : CVE-2026-44236

JSON object : View

Products Affected

No product.

CWE

CWE-122

Heap-based Buffer Overflow

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