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VulnerabilityPublished Updated

CVE-2026-115942: Qpid proton · A misconfigured wildcard TLS certificate causes a stack read overflow

Affects qpid-protonSource GCVE Database

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Authoritative record:CVE-2026-115942· High

Not known to be exploited · fixed in 0.41.1 : patch qpid-proton soon.

Data as of 5 Nov 2026, 12:35 UTC

Severity
High

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in 0.41.1

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Ubuntu 26.10qpid-protonpkg:deb/ubuntu/qpid-proton?arch=source&distro=stonkingOther threatsAffected
  • 0.37.0-7build1 – 0.37.0-9build1
4 affected builds
Fixed in–
Ubuntu 26.04 LTSqpid-protonpkg:deb/ubuntu/qpid-proton?arch=source&distro=resoluteOther threatsAffected
  • 0.37.0-6 – 0.37.0-7build1
4 affected builds
Fixed in–
Ubuntu 24.04 LTSqpid-protonpkg:deb/ubuntu/qpid-proton?arch=source&distro=nobleOther threatsAffected
  • 0.37.0-2build1 – 0.37.0-2build5
4 affected builds
Fixed in–
Ubuntu 22.04 LTSqpid-protonpkg:deb/ubuntu/qpid-proton?arch=source&distro=jammyOther threatsAffected
  • 0.22.0-5.1 – 0.22.0-5.1ubuntu2
4 affected builds
Fixed in–
Ubuntu 20.04 LTSqpid-protonpkg:deb/ubuntu/qpid-proton?arch=source&distro=focalOther threatsAffected
  • 0.22.0-3.2 – 0.22.0-3.3build1
4 affected builds
Fixed in–
Ubuntu 18.04 LTSqpid-protonpkg:deb/ubuntu/qpid-proton?arch=source&distro=bionicOther threatsAffected
  • =0.14.0-5.1
  • =0.14.0-5.1ubuntu1
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

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.

References

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