CVE-2026-32327CWE-674

CVE-2026-32327

Critical · published August 6, 2026

CVSS v3.1

9.1

EPSS

Percentile

38.8

In the wild

Unconfirmed

What it is

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.

The record

Technical detail

CVSS v3.1: 9.1 · CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CVSS v4.0: Not supplied
EPSS: 0.00458 · 38.8th percentile
Weakness: CWE-674 · Uncontrolled Recursion
Published: 2026-08-06T19:16Z

Affected products (1)

Product	Versions	Fixed in
apache/apr-util	< 1.6.4	1.6.4

References (2)

https://lists.apache.org/thread/hq27vj8yfno9tkwv0fpj6jksfzgxvth1 · [email protected]http://www.openwall.com/lists/oss-security/2026/08/06/9 · af854a3a-2127-422b-91ae-364da2661108

EPSS history

Timeline

06 AUG 14:32Z
Apache Portable Runtime Utility: apr-util XML stack recursion crash
cvelistv5