Skip to main content
No exploitation reported

CVE-2026-114230

Apache Qpid Proton C: Potential authentication bypass: regular AMQP frames can be sent as SASL frames

No exploitation reported by the sources we read.

  • Published2026-10-29
  • WeaknessCWE-305

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

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.

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:H/A:H
Published
2026-10-29
Last Modified
2026-11-05
NVD status
Deferred
GitHub Advisory
GHSA-v3qr-mjxm-7376

Frequently asked questions

What is CVE-2026-114230?

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.

Is CVE-2026-114230 actively exploited?

Active exploitation of CVE-2026-114230 has not been confirmed. Its EPSS score was 0.3% on 2026-11-05, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-114230?

CVE-2026-114230 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Running qpid-proton? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this productCISA KEV additions, November 2026Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database

Sources for this record