Vulnerability · Published Oct 29, 2026 · Assigned by apache
CVE-2026-105042Apache Qpid Proton C: Unbounded recursion in parsing AMQP message bodies can lead to crash
Critical 9.8
In plain English
A critical-severity security flaw in Apache Qpid Proton C from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.5%top 59.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A message body that is deeply nested and decoded by pn_message_body() could overflow the stack and cause a crash. This issue affects Apache Qpid Proton C: through 0.40.0. Users are recommended to upgrade to version 0.41.1, which fixes the issue.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | qpid-proton | no fix listed | DEBIAN-CVE-2026-105042 |
| Debian:13 | qpid-proton | no fix listed | DEBIAN-CVE-2026-105042 |
| Debian:14 | qpid-proton | no fix listed | DEBIAN-CVE-2026-105042 |
| Ubuntu:22.04:LTS | qpid-proton | no fix listed | UBUNTU-CVE-2026-105042 |
| Ubuntu:24.04:LTS | qpid-proton | no fix listed | UBUNTU-CVE-2026-105042 |
| Ubuntu:26.04:LTS | qpid-proton | no fix listed | UBUNTU-CVE-2026-105042 |
| Ubuntu:26.10 | qpid-proton | no fix listed | UBUNTU-CVE-2026-105042 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Apache Software Foundation | Apache Qpid Proton C | 0 – through 0.40.0 |
Weakness: CWE-674 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H