CVE-2026-32327

Apache Portable Runtime Utility: apr-util XML stack recursion crash

State: Published
Severity: 9.1 Critical
Published: Aug 6, 2026
Updated: Aug 6, 2026
Reserved: Mar 12, 2026

Description

A bug in APR-util version 1.6.3 (and earlier) allows a stack recursion attack against any library consumer which parses XML from untrusted sources and uses the apr_xml_quote_elem() function.

Users are recommended to upgrade to version 1.6.4, which fixes this issue.

Scores

CVSS	Score	Vector	Source
3.1	9.1 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H	CISA-ADP

Weaknesses

CWE-674 Uncontrolled Recursion

Affected Products

Product	Versions
Apache Portable Runtime UtilityApache Software Foundation	1.6.3 and earlierAffected

References

https://lists.apache.org/thread/hq27vj8yfno9tkwv0fpj6jksfzgxvth1vendor-advisory
http://www.openwall.com/lists/oss-security/2026/08/06/9

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