Vulnerability details
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
CVSS 3.1
9.8Critical
Official description
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 scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.8Critical | 3.1 | CISA ADP / Vulnrichment (CISA-ADP) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Apache Software Foundation | Apache Qpid Proton C | v ≤ 0.40.0 | CVEProject cvelistV5 (CNA) |
References and advisories
2
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Details
- Published
- 2026-10-29
- Last updated
- 2026-11-06
- State
- Published
- Assigner (CNA)
- apache
- Kolun priority
- 25 · Low
Exploit prediction (EPSS)
0.49%
Probability of exploitation in 30 days
42.8%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-305Authentication bypass by primary weakness