CVE-2026-66257

Summary

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.

Affected Software

Weaknesses

• CWE-770: CWE-770 Allocation of Resources Without Limits or Throttling

ADP Enrichment

CVE Program Container

Additional References

• http://www.openwall.com/lists/oss-security/2026/08/04/8

References

• https://lists.apache.org/thread/dnczt6bgfcq2x6q8ljco177h1qmv59fm

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