CVE-2026-114230: Qpid proton · When dispatching SASL frames to authenticate the peer, Proton will also dispatch AMQP
Affects qpid-protonSource GCVE Database
Not known to be exploited · fixed in 0.41.1 : patch qpid-proton soon.
Data as of 5 Nov 2026, 12:35 UTC
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
Disclosed: evidence found.
CVE published 29 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.10qpid-protonpkg:deb/ubuntu/qpid-proton?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSqpid-protonpkg:deb/ubuntu/qpid-proton?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSqpid-protonpkg:deb/ubuntu/qpid-proton?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 22.04 LTSqpid-protonpkg:deb/ubuntu/qpid-proton?arch=source&distro=jammyOther threats | Affected
| Fixed in– |
Ubuntu 20.04 LTSqpid-protonpkg:deb/ubuntu/qpid-proton?arch=source&distro=focalOther threats | Affected
| Fixed in– |
Ubuntu 18.04 LTSqpid-protonpkg:deb/ubuntu/qpid-proton?arch=source&distro=bionicOther threats | Affected
| 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
- ubuntu.com/security/CVE-2026-114230 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-114230 (opens in a new tab)
- openwall.com/lists/oss-security/2026/10/28/24 (opens in a new tab)
- issues.apache.org/jira/browse/PROTON-2945 (opens in a new tab)
- github.com/apache/qpid-proton/commit/94e2df384a493cbb8a4870a40d90e08708e131eb (opens in a new tab)
- github.com/apache/qpid-proton/commit/b7fb4507bb233db10825e6ffd456086dedca22f6 (opens in a new tab)
- lists.apache.org/thread.html/ob7vo6swpj4wbb2m3zq9q2vkwfg5dg8k (opens in a new tab)
- openwall.com/lists/oss-security/2026/10/28/24 (opens in a new tab)