CVE-2026-66274: Apache Qpid Proton-J: Unbounded type nesting can lead to pre-authentication stackoverflow

August 5, 2026 (updated November 3, 2026)

A pre-authentication attacker could leverage type nesting to cause a StackOverflowError potentially leading to denial of service.

This issue affects Apache Qpid Proton-J: through 0.34.1.

Users are recommended to upgrade to version 0.35.0, which fixes the issue.

References

github.com/advisories/GHSA-p2gc-fm5w-94jj
github.com/apache/qpid-proton-j/commit/92047419cc87bab6220e7adeb354958d8109618e
github.com/apache/qpid-proton-j/releases/tag/0.35.0
lists.apache.org/thread/h7xolzws2by2qhdjf7scbx87foxojb5h
nvd.nist.gov/vuln/detail/CVE-2026-66274

Code Behaviors & Features

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