alanxz rabbitmq-c up to 0.16.x out-of-bounds

Summaryinfo

A vulnerability was found in alanxz rabbitmq-c up to 0.16.x. It has been declared as critical. Affected by this issue is some unknown functionality. Executing a manipulation can lead to out-of-bounds. This vulnerability is tracked as CVE-2026-59986. The attack can be launched remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in alanxz rabbitmq-c up to 0.16.x. It has been declared as critical. This vulnerability affects some unknown processing. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

rabbitmq-c is a C-language AMQP client library for RabbitMQ. Prior to version 0.17.0, the bounds check (*offset = o + len) <= encoded.len overflows when o + len > SIZE_MAX on 32-bit systems. len is a uint32_t read from the AMQP wire as a BYTES/UTF8 field length. The overflow wraps the check to a small value that passes, producing a decoded amqp_bytes_t with a multi-GB .len pointing into a small frame buffer. This results in an out-of-bounds read of up to ~4GB of process memory on 32-bit systems (ARM, MIPS, x86 ILP32, embedded IoT AMQP clients). Enabling information disclosure or denial of service. Not exploitable on 64-bit systems where size_t is 64-bit. This issue has been patched in version 0.17.0.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-59986 since 07/07/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

Upgrading to version 0.17.0 eliminates this vulnerability.

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Productinfo

Vendor

• alanxz

Name

• rabbitmq-c

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16

Website

• Product: https://github.com/alanxz/rabbitmq-c/

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