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.
Published: 2026-08-06
Score: 9.1 Critical
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
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Remediation

No vendor fix or workaround currently provided.

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History

Thu, 06 Aug 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H'}

ssvc

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


Thu, 06 Aug 2026 16:45:00 +0000

Type Values Removed Values Added
First Time appeared Apache
Apache portable Runtime Utility
Vendors & Products Apache
Apache portable Runtime Utility

Thu, 06 Aug 2026 14:45:00 +0000

Type Values Removed Values Added
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.
Title Apache Portable Runtime Utility: apr-util XML stack recursion crash
Weaknesses CWE-674
References

Subscriptions

Apache Portable Runtime Utility
cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2026-08-06T21:56:07.488Z

Reserved: 2026-03-12T08:57:52.096Z

Link: CVE-2026-32327

cve-icon Vulnrichment

Updated: 2026-08-06T17:45:55.935Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-06T19:30:05Z

Weaknesses