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VulnerabilityPublished Updated

CVE-2026-114230: Qpid proton · When dispatching SASL frames to authenticate the peer, Proton will also dispatch AMQP

Affects qpid-protonSource GCVE Database

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Authoritative record:CVE-2026-114230· 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

When dispatching SASL frames to authenticate the peer, Proton will also dispatch AMQP frames if they claim to be SASL frames. This allows authentication bypass. However there will be no user name set so the effects depend on how the application deals with this condition - which otherwise means that authentication has not completed yet. 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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