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
No CVSS.
References
Configurations
No configuration.
History
29 Oct 2026, 12:17
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29 Oct 2026, 11:17
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Information
Published : 2026-10-29 11:17
Updated : 2026-10-29 15:43
NVD link : CVE-2026-114230
Mitre link : CVE-2026-114230
CVE.ORG link : CVE-2026-114230
JSON object : View
Products Affected
No product.
CWE
CWE-305
Authentication Bypass by Primary Weakness
