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No exploitation reported

CVE-2026-115942

Apache Qpid Proton C: Verifying non compliant TLS wildcard cert can cause stack buffer overflow read

No exploitation reported by the sources we read.

  • Published2026-10-29
  • WeaknessCWE-125

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A misconfigured wildcard TLS certificate causes a stack read overflow. This issue does not affect any wildcard certificate issued to the RFC9525 standard - the fix only accepts certificates that comply to this standard. 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.

Timeline

dates in UTC
  1. 2026-10-2910:19CVE publishedCNA

Versions per branch

Products declared by the CNA1 product

As apache, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Apache Software Foundation Apache Qpid Proton Cother versions: not affected
    Affected
    • ≤ 0.40.0no fix statedsemver

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-10-29

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • qpid-protonUbuntu:26.10all versions · no fixed version listed
  • qpid-protonUbuntu:26.04:LTSall versions · no fixed version listed
  • qpid-protonUbuntu:24.04:LTSall versions · no fixed version listed
  • qpid-protonUbuntu:22.04:LTSall versions · no fixed version listed
  • qpid-protonUbuntu:20.04:LTSall versions · no fixed version listed
  • qpid-protonUbuntu:18.04:LTSall versions · no fixed version listed
  • qpid-protonUbuntu:16.04:LTSall versions · no fixed version listed
  • qpid-protonDebian:14all versions · no fixed version listed

3 more package ranges on OSV.dev

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
2026-10-29
Last Modified
2026-11-05
NVD status
Deferred
GitHub Advisory
GHSA-h5r3-v75j-gx8v

Frequently asked questions

What is CVE-2026-115942?

A misconfigured wildcard TLS certificate causes a stack read overflow. This issue does not affect any wildcard certificate issued to the RFC9525 standard - the fix only accepts certificates that comply to this standard. 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.

Is CVE-2026-115942 actively exploited?

Active exploitation of CVE-2026-115942 has not been confirmed. Its EPSS score was 0.1% on 2026-11-05, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-115942?

CVE-2026-115942 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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