Vulnerability · Published Aug 6, 2026 · Assigned by apache
CVE-2026-32327Apache Portable Runtime Utility: apr-util XML stack recursion crash
Critical 9.1
In plain English
A critical-severity security flaw in Apache Portable Runtime Utility from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | apr-util | 1.6.3-23.el10_2.1 | ALSA-2026:66392 |
| AlmaLinux:8 | apr-util | 1.6.1-9.el8_10.1 | ALSA-2026:69113 |
| AlmaLinux:9 | apr-util | 1.6.1-23.el9_8.1 | ALSA-2026:66341 |
| AlmaLinux:8 | apr-util-bdb | 1.6.1-9.el8_10.1 | ALSA-2026:69113 |
| AlmaLinux:9 | apr-util-bdb | 1.6.1-23.el9_8.1 | ALSA-2026:66341 |
| AlmaLinux:10 | apr-util-devel | 1.6.3-23.el10_2.1 | ALSA-2026:66392 |
| AlmaLinux:8 | apr-util-devel | 1.6.1-9.el8_10.1 | ALSA-2026:69113 |
| AlmaLinux:9 | apr-util-devel | 1.6.1-23.el9_8.1 | ALSA-2026:66341 |
| AlmaLinux:10 | apr-util-ldap | 1.6.3-23.el10_2.1 | ALSA-2026:66392 |
| AlmaLinux:8 | apr-util-ldap | 1.6.1-9.el8_10.1 | ALSA-2026:69113 |
| AlmaLinux:9 | apr-util-ldap | 1.6.1-23.el9_8.1 | ALSA-2026:66341 |
| AlmaLinux:10 | apr-util-lmdb | 1.6.3-23.el10_2.1 | ALSA-2026:66392 |
| AlmaLinux:10 | apr-util-mysql | 1.6.3-23.el10_2.1 | ALSA-2026:66392 |
| AlmaLinux:8 | apr-util-mysql | 1.6.1-9.el8_10.1 | ALSA-2026:69113 |
| AlmaLinux:9 | apr-util-mysql | 1.6.1-23.el9_8.1 | ALSA-2026:66341 |
| AlmaLinux:10 | apr-util-odbc | 1.6.3-23.el10_2.1 | ALSA-2026:66392 |
| AlmaLinux:8 | apr-util-odbc | 1.6.1-9.el8_10.1 | ALSA-2026:69113 |
| AlmaLinux:9 | apr-util-odbc | 1.6.1-23.el9_8.1 | ALSA-2026:66341 |
| AlmaLinux:10 | apr-util-openssl | 1.6.3-23.el10_2.1 | ALSA-2026:66392 |
| AlmaLinux:8 | apr-util-openssl | 1.6.1-9.el8_10.1 | ALSA-2026:69113 |
| AlmaLinux:9 | apr-util-openssl | 1.6.1-23.el9_8.1 | ALSA-2026:66341 |
| AlmaLinux:10 | apr-util-pgsql | 1.6.3-23.el10_2.1 | ALSA-2026:66392 |
| AlmaLinux:8 | apr-util-pgsql | 1.6.1-9.el8_10.1 | ALSA-2026:69113 |
| AlmaLinux:9 | apr-util-pgsql | 1.6.1-23.el9_8.1 | ALSA-2026:66341 |
| AlmaLinux:10 | apr-util-sqlite | 1.6.3-23.el10_2.1 | ALSA-2026:66392 |
| AlmaLinux:8 | apr-util-sqlite | 1.6.1-9.el8_10.1 | ALSA-2026:69113 |
| AlmaLinux:9 | apr-util-sqlite | 1.6.1-23.el9_8.1 | ALSA-2026:66341 |
| Alpine:v3.21 | apr-util | 1.6.4-r0 | ALPINE-CVE-2026-32327 |
| Alpine:v3.22 | apr-util | 1.6.4-r0 | ALPINE-CVE-2026-32327 |
| Alpine:v3.23 | apr-util | 1.6.4-r0 | ALPINE-CVE-2026-32327 |
| Alpine:v3.24 | apr-util | 1.6.4-r0 | ALPINE-CVE-2026-32327 |
| Debian:12 | apr-util | 1.6.3-1+deb12u1 | DEBIAN-CVE-2026-32327 |
| Debian:13 | apr-util | 1.6.3-3+deb13u1 | DEBIAN-CVE-2026-32327 |
| Debian:14 | apr-util | 1.6.4-1 | DEBIAN-CVE-2026-32327 |
| Rocky Linux:10 | apr-util | 0:1.6.3-23.el10_2.1 | RLSA-2026:66392 |
| Rocky Linux:8 | apr-util | 0:1.6.1-9.el8_10.1 | RLSA-2026:69113 |
| Rocky Linux:9 | apr-util | 0:1.6.1-23.el9_8.1 | RLSA-2026:66341 |
| Ubuntu:22.04:LTS | apr-util | 1.6.1-5ubuntu4.22.04.3 | USN-8719-1 |
| Ubuntu:22.04:LTS | apr-util | 1.6.1-5ubuntu4.22.04.3 | UBUNTU-CVE-2026-32327 |
| Ubuntu:24.04:LTS | apr-util | 1.6.3-1.1ubuntu7.1 | USN-8719-1 |
| Ubuntu:24.04:LTS | apr-util | 1.6.3-1.1ubuntu7.1 | UBUNTU-CVE-2026-32327 |
| Ubuntu:26.04:LTS | apr-util | 1.6.3-3ubuntu3.1 | UBUNTU-CVE-2026-32327 |
| Ubuntu:26.04:LTS | apr-util | 1.6.3-3ubuntu3.1 | USN-8719-1 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Apache Software Foundation | Apache Portable Runtime Utility | 0 – through 1.6.3 |
Weakness: CWE-674 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H