CVE-2026-32327

NameCVE-2026-32327
DescriptionA 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.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDSA-6437-1
Debian Bugs1143837

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
apr-util (PTS)bullseye (security), bullseye1.6.1-5+deb11u1vulnerable
bookworm1.6.3-1vulnerable
trixie1.6.3-3vulnerable
trixie (security)1.6.3-3+deb13u1fixed
forky, sid1.6.4-2fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
apr-utilsourcetrixie1.6.3-3+deb13u1DSA-6437-1
apr-utilsource(unstable)1.6.4-11143837

Notes

https://lists.apache.org/thread/hq27vj8yfno9tkwv0fpj6jksfzgxvth1
Fixed by: https://github.com/apache/apr-util/commit/414e12e427c89f135d8ee66ab1203feffd3e2bd8 (1.6.4-rc1-candidate)
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