CVE-2026-114230: Apache Qpid Proton C SASL authentication bypass

CVE-2026-114230 · Severity: info · Published 2026-10-29

Apache Qpid Proton C is an open-source messaging library used by applications to communicate over the AMQP protocol with authentication. A flaw allows attackers to bypass SASL authentication by sending crafted frames, potentially gaining access without valid credentials. The actual impact depends on how the application handles authentication failures, but could lead to unauthorized access to messaging systems.

Technologies: Apache Qpid Proton C. Vendors: Apache.

Quick answers

Is CVE-2026-114230 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-114230 being exploited in the wild.
How severe is CVE-2026-114230?
Informational severity, published 29 October 2026.
Which products and versions are affected?
Apache Qpid Proton C through 0.40.0.
Is there a fix for CVE-2026-114230?
Yes: fixed in 0.41.1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-114230 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2026-114230?
Check whether you run Apache Qpid Proton C at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • Fixed in: 0.41.1

Technical details

The vulnerability exists in Proton's SASL frame dispatcher, which incorrectly processes AMQP frames that claim to be SASL frames during the authentication handshake. An attacker can send malformed frames over the network to bypass peer authentication. While no username is set upon successful bypass, applications that do not properly validate authentication completion may grant access or perform privileged operations.

Affected products

  • Apache Qpid Proton C through 0.40.0

Timeline

  • 2026-10-29: disclosed

References

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