CVE-2026-114230
When dispatching SASL frames to authenticate the peer, Proton will also dispatch AMQP frames if…
- Risk score
- 68/100
- CVSS
- 9.8 v3.1
- Exploit chance (30 days)
- 0.3%
- Published
- 29 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 …
- Affected
- See advisory
- Fix
- Upgrade the product to 0.41.1 or later.
- Exploitation
- No known exploitation
Why it is Amber
- CVSS 9.8 critical
- Remotely exploitable without logging in
References
Original 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.
Last activity 29 Oct 2026. Patch Forecast updates every hour.