Paper/Archive/CVE-2026-114230

CVE-2026-114230

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

EPSS 0.3%CVSS 9.8

critical.is priorityof 100

CVSS 9.8 (ADP)9.8 / 10 × 3029.4 Not in CISA KEV+300.0 EPSS percentile 19.0.190 × 203.8 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource

Apache Qpid Proton C≤ 0.40.0–CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

advisorylists.apache.org/thread.html/ob7vo6swpj4wbb2m3zq9q2vkwfg5dg8k refopenwall.com/lists/oss-security/2026/10/28/24