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VulnerabilityPublished

CVE-2026-114230: When dispatching SASL frames to authenticate the peer, Proton will also dispatch AMQP frames if they

Source GCVE Database

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Authoritative record:CVE-2026-114230· High

Not known to be exploited · fixed in 0.41.1 : patch Apache Qpid Proton C soon.

Data as of 29 Oct 2026, 13:47 UTC

Severity
High

Rated High by Threat Radar's AI analysis · 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 29 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Apache Software FoundationApache Qpid Proton CAffected
  • <=0.40.0
Fixed in–

AI-suggested

Users should upgrade Apache Qpid Proton C to version 0.41.1, which contains the fix for this authentication bypass vulnerability. No other mitigation is indicated by the vendor advisory.

Description

Apache Qpid Proton C versions through 0.40.0 have a vulnerability in the SASL authentication frame dispatching process. The software incorrectly dispatches AMQP frames that claim to be SASL frames, allowing an authentication bypass. However, no user name is set during this bypass, so the impact depends on how the application handles an unauthenticated state. The issue is fixed in version 0.41.1.

References

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