CVSS 3.1
7.4 highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:HCVE-2026-59986 alanxz rabbitmq-c: Out-of-bounds Read
High (7.4) in alanxz rabbitmq-c. EPSS 0.5% estimated probability of exploitation activity in the next 30 days.
On this page
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.
Severity
- EPSS
- 0.5% estimated probability of exploitation activity in the next 30 days; 44th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
- CISA's assessment (SSVC)
- Exploitation: PoC · Automatable: no · Technical impact: partial, assessed 2026-11-10. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
- CWEs
- CWE-125 Out-of-bounds Read
CWE-190 Integer Overflow or Wraparound (Year 2038 problem, Y2K38, Y2038, Epochalypse) - Published
- Modified
- Assigned by
- GitHub_M (CNA)
- NVD analysis
- Deferred: the NVD does not plan to analyze it
- Record from
- the NVD, synced
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Affected
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| alanxz rabbitmq-c | < 0.17.0 |
Fix and patched versions
- Debian, Ubuntu: fixed package versions per release
Linux distributions
| Distribution | Release | Package | Fixed in | Advisory |
|---|---|---|---|---|
| Debian | 12 | librabbitmq | 0.11.0-1+deb12u3 | DEBIAN-CVE-2026-59986 |
| Debian | 13 | librabbitmq | 0.15.0-1+deb13u2 | DEBIAN-CVE-2026-59986 |
| Debian | 14 | librabbitmq | 0.17.0-1 | DEBIAN-CVE-2026-59986 |
| Ubuntu | 22.04:LTS | librabbitmq | 0.10.0-1ubuntu2.2 | UBUNTU-CVE-2026-59986 USN-8724-1 |
| Ubuntu | 24.04:LTS | librabbitmq | 0.11.0-1ubuntu0.2 | UBUNTU-CVE-2026-59986 USN-8724-1 |
| Ubuntu | 26.04:LTS | librabbitmq | 0.15.0-1ubuntu0.26.04.2 | UBUNTU-CVE-2026-59986 USN-8724-1 |
| Ubuntu | Pro:14.04:LTS | librabbitmq | 0.4.1-1ubuntu0.1~esm2 | UBUNTU-CVE-2026-59986 USN-8724-1 |
| Ubuntu | Pro:16.04:LTS | librabbitmq | 0.7.1-1ubuntu0.2+esm1 | UBUNTU-CVE-2026-59986 USN-8724-1 |
| Ubuntu | Pro:18.04:LTS | librabbitmq | 0.8.0-1ubuntu0.18.04.2+esm1 | UBUNTU-CVE-2026-59986 USN-8724-1 |
| Ubuntu | Pro:20.04:LTS | librabbitmq | 0.10.0-1ubuntu0.20.04.1~esm1 | UBUNTU-CVE-2026-59986 USN-8724-1 |
| Azure Linux | 3 | librabbitmq | no fix listed | AZL-113365 |
From the distributions' data via OSV.dev: the Debian Security Tracker; Ubuntu Security Notices © Canonical Ltd., CC BY-SA 4.0; Microsoft's Azure Linux vulnerability data, MIT. Modified: reformatted and linked to CVE records. Credits. On the distributions' own pages: Debian · Ubuntu.
Attack patterns (CAPEC)
- CAPEC-540 Overread Buffers Likelihood: Low · Severity: High
- CAPEC-92 Forced Integer Overflow Likelihood: High · Severity: High
The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.
History
- The NVD deferred its analysis
Changes since this site first stored the record. The same for every record: /api/public/changes.