Quick answers
- Is CVE-2026-115942 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-115942 being exploited in the wild.
- How severe is CVE-2026-115942?
- Informational severity, published 29 October 2026.
- Which products and versions are affected?
- Apache Qpid Proton C through 0.40.0.
- Is there a fix for CVE-2026-115942?
- Yes: fixed in Apache Qpid Proton C 0.41.1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-115942 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-115942?
- Check whether you run Apache Qpid Proton C at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: Apache Qpid Proton C 0.41.1
Technical details
A stack read overflow occurs when processing misconfigured wildcard TLS certificates in Apache Qpid Proton C through version 0.40.0. The vulnerability is triggered during TLS certificate validation and can leak stack memory. The fix restricts certificate acceptance to RFC 9525-compliant certificates only, eliminating the vulnerable code path.
Affected products
- Apache Qpid Proton C through 0.40.0
Timeline
- 2026-10-29: disclosed