CVE-2026-66257

Apache Qpid Proton-J: Unbounded symbol value caching can lead to pre-authentication resource exhaustion

Published Aug 5, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Apache
Apache qpid Proton-j
Vendors & Products Apache
Apache qpid Proton-j
Type Values Removed Values Added
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.
Title Apache Qpid Proton-J: Unbounded symbol value caching can lead to pre-authentication resource exhaustion
Weaknesses CWE-770
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
apache
Published
Updated
Aug 6, 2026, 1:13 PM
Reserved
Jul 24, 2026, 10:40 AM
Status
Analyzed
Published
Aug 5, 2026, 6:16 AM
Modified
Oct 24, 2026, 4:10 PM