High severity7.5NVD Advisory· Published Aug 5, 2026· Updated Aug 7, 2026
CVE-2026-66257
CVE-2026-66257
Description
A pre-authentication attacker could leverage unbounded symbol value caching to cause resource exhaustion 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.
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Affected products
2cpe:2.3:a:apache:qpid_proton-j:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:apache:qpid_proton-j:*:*:*:*:*:*:*:*range: <0.35.0
- (no CPE)range: <=0.34.1
Patches
Vulnerability mechanics
References
2- www.openwall.com/lists/oss-security/2026/08/04/8nvdMailing ListThird Party Advisory
- lists.apache.org/thread/dnczt6bgfcq2x6q8ljco177h1qmv59fmnvdMailing ListVendor Advisory
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