CVE-2026-114230criticalCWE-305

CVE-2026-114230: critical vulnerability in Apache Qpid Proton C

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

Published · Updated

Follow this CVE+ Monitor Apache Qpid Proton C+ Monitor qpid-proton

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

28Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 9.8epss 0.5%
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Apache Software Foundation · Apache Qpid Proton C
Related CVEs — Apache Qpid Proton C

In the same product, most dangerous first.

CVE-2026-105042CRITICALApache Qpid Proton C: Unbounded recursion in parsing AMQP message bodies can lead to crashEPSS 0.5%CVE-2026-105031CRITICALApache Qpid Proton C: The OpenSSL TLS implementation adds a locally trusted certificate authority to the existing trusted system trust anchors.EPSS 0.3%CVE-2026-115942HIGHApache Qpid Proton C: Verifying non compliant TLS wildcard cert can cause stack buffer overflow readEPSS 0.2%