{"id":"CVE-2026-114230","title":"Apache Qpid Proton C: Potential authentication bypass: regular AMQP frames can be sent as SASL frames","summary":"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 appl…","severity":"none","cwe":["CWE-305"],"vendor":"Apache Software Foundation","product":"Apache Qpid Proton C","affected":["apache_qpid_proton_c <= 0.40.0"],"published":"2026-10-29","updated":"2026-10-29","sourceUpdated":"2026-10-29T11:09:06.927Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-114230","references":[{"url":"https://lists.apache.org/thread.html/ob7vo6swpj4wbb2m3zq9q2vkwfg5dg8k"}],"tags":["cve.org"],"epss":0.00268,"epssPercentile":0.18957,"ingestedAt":"2026-11-01T17:57:46.228Z","slug":"CVE-2026-114230","body":"## Overview\n\nWhen 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.\n\n\n\nThis issue affects Apache Qpid Proton C: through 0.40.0.\n\n\n\nUsers are recommended to upgrade to version 0.41.1, which fixes the issue.\n\n## Affected\n\n- `apache_qpid_proton_c <= 0.40.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}