# CVE-2026-44235: librabbitmq: rabbitmq-c is a C-language AMQP client library for RabbitMQ

CVE-2026-44235 is fixed in 3 products on 1 platform, first by amqp-tools 0.15.0-1ubuntu0.26.04.1, released June 10, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-44235
- Priority: Routine
- CVSS: 6.5 (medium)
- EPSS: 0.0031
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 10, 2026

## Description

rabbitmq-c is a C-language AMQP client library for RabbitMQ. Prior to 0.16.0, a malicious AMQP server can send an undersized HEADER or METHOD frame during client login and cause unsigned size_t underflow in amqp_handle_input() in librabbitmq/amqp_connection.c. The parser subtracts HEADER_SIZE, fixed per-frame fields, and FOOTER_SIZE from state->target_size without first checking the minimum frame length. The wrapped encoded.len value is passed through amqp_decode_properties() to amqp_decode_table_internal(), where it defeats bounds checks and causes an out-of-bounds read and process crash. An on-path attacker can also trigger the issue when AMQP traffic is not protected by TLS with certificate validation. The demonstrated impact is denial of service, with no reliable memory disclosure or code execution shown. This issue is fixed in version 0.16.0.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | amqp-tools Ubuntu 18.04.6 LTS (bionic) | 0.8.0-1ubuntu0.18.04.2+esm1 | [amqp-tools 0.8.0-1ubuntu0.18.04.2+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-amqp-tools-0.8.0-1ubuntu0.18.04.2-esm1.md) | Jul 28, 2026 |
| Linux | amqp-tools Ubuntu 20.04 LTS (focal) | 0.10.0-1ubuntu0.20.04.1~esm1 | [amqp-tools 0.10.0-1ubuntu0.20.04.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-amqp-tools-0.10.0-1ubuntu0.20.04.1-esm1.md) | Jul 28, 2026 |
| Linux | amqp-tools Ubuntu 22.04.1 LTS (jammy) | 0.10.0-1ubuntu2.1 | [amqp-tools 0.10.0-1ubuntu2.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-amqp-tools-0.10.0-1ubuntu2.1.md) | Jun 24, 2026 |
| Linux | amqp-tools Ubuntu 24.04.5 LTS (noble) | 0.11.0-1ubuntu0.1 | [amqp-tools 0.11.0-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-amqp-tools-0.11.0-1ubuntu0.1.md) | Jun 24, 2026 |
| Linux | amqp-tools Ubuntu 25.10 (questing) | 0.15.0-1ubuntu0.25.10.1 | [amqp-tools 0.15.0-1ubuntu0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-amqp-tools-0.15.0-1ubuntu0.25.10.1.md) | Jun 24, 2026 |
| Linux | amqp-tools Ubuntu 26.04.1 LTS (resolute) | 0.15.0-1ubuntu0.26.04.1 | [amqp-tools 0.15.0-1ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-amqp-tools-0.15.0-1ubuntu0.26.04.1.md) | Jun 10, 2026 |
| Linux | librabbitmq Debian 12.15 (bookworm) | 0.11.0-1+deb12u2 | [DEBIAN-CVE-2026-44235](https://patchblox.com/security/data/fix/linux/debian-cve-2026-44235.md) | Jun 24, 2026 |
| Linux | librabbitmq Debian 13.5 (trixie) | 0.15.0-1+deb13u1 | [DEBIAN-CVE-2026-44235](https://patchblox.com/security/data/fix/linux/debian-cve-2026-44235.md) | Jun 24, 2026 |
| Linux | librabbitmq Debian 14 | 0.16.0-1 | [DEBIAN-CVE-2026-44235](https://patchblox.com/security/data/fix/linux/debian-cve-2026-44235.md) | Jun 24, 2026 |
| Linux | librabbitmq4 Ubuntu 18.04.6 LTS (bionic) | 0.8.0-1ubuntu0.18.04.2+esm1 | [librabbitmq4 0.8.0-1ubuntu0.18.04.2+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-librabbitmq4-0.8.0-1ubuntu0.18.04.2-esm1.md) | Jul 28, 2026 |
| Linux | librabbitmq4 Ubuntu 20.04 LTS (focal) | 0.10.0-1ubuntu0.20.04.1~esm1 | [librabbitmq4 0.10.0-1ubuntu0.20.04.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-librabbitmq4-0.10.0-1ubuntu0.20.04.1-esm1.md) | Jul 28, 2026 |
| Linux | librabbitmq4 Ubuntu 22.04.1 LTS (jammy) | 0.10.0-1ubuntu2.1 | [librabbitmq4 0.10.0-1ubuntu2.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-librabbitmq4-0.10.0-1ubuntu2.1.md) | Jun 24, 2026 |
| Linux | librabbitmq4 Ubuntu 24.04.5 LTS (noble) | 0.11.0-1ubuntu0.1 | [librabbitmq4 0.11.0-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-librabbitmq4-0.11.0-1ubuntu0.1.md) | Jun 24, 2026 |
| Linux | librabbitmq4 Ubuntu 25.10 (questing) | 0.15.0-1ubuntu0.25.10.1 | [librabbitmq4 0.15.0-1ubuntu0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-librabbitmq4-0.15.0-1ubuntu0.25.10.1.md) | Jun 24, 2026 |
| Linux | librabbitmq4 Ubuntu 26.04.1 LTS (resolute) | 0.15.0-1ubuntu0.26.04.1 | [librabbitmq4 0.15.0-1ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-librabbitmq4-0.15.0-1ubuntu0.26.04.1.md) | Jun 10, 2026 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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