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CVE-2026-67591CWE-770

Apache Qpid ProtonJ2: Incoming session flow control window can be exceeded

3Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackepss 0.3%
exploitation probability
0.3%top 78% of all CVEs
observed exploitation
nono source reports it
An authenticated attacker could exceed the session flow control incoming window potentially leading to denial of service. This issue affects Apache Qpid ProtonJ2: through 1.1.0. Users are recommended to upgrade to version 1.2.0, which fixes the issue.