CVE-2026-66257

HIGH

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

Title source: cna
STIX 2.1

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.

References (2)

Core 2

Scores

CVSS v3 7.5
EPSS 0.0043
EPSS Percentile 35.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-770
Status published
Products (2)
apache/qpid_proton-j < 0.35.0
Apache Software Foundation/Apache Qpid Proton-J < 0.34.1
Published Aug 05, 2026
Tracked Since Aug 05, 2026