Critical 9.1Published Aug 6, 2026

CVE-2026-32327Apache Portable Runtime Utility: apr-util XML stack recursion crash

Updated under an hour ago (2026-10-19 06:30 UTC)

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It affects Apache Software Foundation Apache Portable Runtime Utility and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Apache Software Foundation Apache Portable Runtime Utility

Exploited in the last 30 days

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.

CVSS: 9.1 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Weakness (CWE): CWE-674
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: apache
NVD analysis: Analyzed
Record last updated: Aug 6, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Apache Software Foundation Apache Portable Runtime Utility apache_software_foundation:apache_portable_runtime_utility (from the name)	through 1.6.3	CNA record
apache apr-util apache:apr-util	before 1.6.4	NVD

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.