Not yet scoredPublished Oct 29, 2026

CVE-2026-114230Apache Qpid Proton C: Potential authentication bypass: regular AMQP frames can be sent as SASL frames

Updated under an hour ago (Oct 30, 2026, 4:40 AM ET)

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It affects Apache Software Foundation Apache Qpid Proton C. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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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.

CVSS: Not yet scored
Weakness (CWE): CWE-305
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: apache
NVD analysis: Deferred
Record last updated: Oct 29, 2026
First seen by InfoSec Signals: Oct 29, 2026

Affected products

Affected products

Apache Software Foundation Apache Qpid Proton C apache_software_foundation:apache_qpid_proton_c (from the name)	through 0.40.0	CNA record

References

References

https://lists.apache.org/thread.html/ob7vo6swpj4wbb2m3zq9q2vkwfg5dg8k	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/10/28/24

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.