CVE-2026-66274

HIGH

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

Title source: cna

Description

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 (2)

Core 2

Core References

Vendor Advisory vendor-advisory

https://lists.apache.org/thread/h7xolzws2by2qhdjf7scbx87foxojb5h

Mailing List

http://www.openwall.com/lists/oss-security/2026/08/04/10

Scores

CVSS v3 7.5

EPSS 0.0049

EPSS Percentile 39.8%

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-674

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