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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade apr-util-odbcUpgrade apr-util-opensslUpgrade apr-util-sqliteUpgrade apr-util-pgsqlUpgrade apr-util-ldapUpgrade apr-util-develUpgrade apr-util-bdbUpgrade apr-utilUpgrade apr-util-mysql | Oct 11, 2026 | Sep 10, 2026 |
| Alpine Linux | — | Upgrade apr-util | Aug 10, 2026 | Aug 6, 2026 |
| Amazon Linux Ami 2 | — | Upgrade apr-utilUpgrade apr-util-mysqlUpgrade apr-util-bdbUpgrade apr-util-develUpgrade apr-util-ldapUpgrade apr-util-pgsqlUpgrade apr-util-nssUpgrade apr-util-opensslUpgrade apr-util-odbcUpgrade apr-util-debuginfoUpgrade apr-util-sqlite | Oct 19, 2026 | Oct 19, 2026 |
| Amazon_linux_2023 | — | Upgrade apr-util-debuginfoUpgrade apr-util-sqliteUpgrade apr-util-lmdbUpgrade apr-util-odbcUpgrade apr-util-mysql-debuginfoUpgrade apr-util-develUpgrade apr-util-opensslUpgrade apr-util-mysqlUpgrade apr-util-lmdb-debuginfoUpgrade apr-utilUpgrade apr-util-pgsqlUpgrade apr-util-sqlite-debuginfoUpgrade apr-util-debugsourceUpgrade apr-util-ldapUpgrade apr-util-openssl-debuginfoUpgrade apr-util-odbc-debuginfoUpgrade apr-util-ldap-debuginfoUpgrade apr-util-pgsql-debuginfo | Sep 1, 2026 | Aug 6, 2026 |
| Debian | — | Upgrade apr-util | Aug 16, 2026 | Aug 16, 2026 |
| Redhat_linux | — | Upgrade apr-utilUpgrade apr-util-sqliteUpgrade apr-util-debugsourceUpgrade apr-util-bdbUpgrade apr-util-debuginfoNo solution existsUpgrade apr-util-mysqlUpgrade apr-util-pgsqlUpgrade apr-util-pgsql-debuginfoUpgrade apr-util-lmdbUpgrade apr-util-lmdb-debuginfoUpgrade apr-util-odbc-debuginfoUpgrade apr-util-odbcUpgrade apr-util-opensslUpgrade apr-util-ldapUpgrade apr-util-openssl-debuginfoUpgrade apr-util-mysql-debuginfoUpgrade apr-util-ldap-debuginfoUpgrade apr-util-develUpgrade apr-util-bdb-debuginfoUpgrade apr-util-sqlite-debuginfo | Aug 12, 2026 | Aug 6, 2026 |
| Rocky_linux | — | Upgrade apr-util-debuginfoUpgrade apr-util-sqliteUpgrade apr-util-mysql-debuginfoUpgrade apr-util-odbcUpgrade apr-util-lmdbUpgrade apr-util-ldapUpgrade apr-util-odbc-debuginfoUpgrade apr-util-bdbUpgrade apr-util-debugsourceUpgrade apr-util-sqlite-debuginfoUpgrade apr-util-develUpgrade apr-util-bdb-debuginfoUpgrade apr-util-pgsqlUpgrade apr-util-lmdb-debuginfoUpgrade apr-utilUpgrade apr-util-mysqlUpgrade apr-util-ldap-debuginfoUpgrade apr-util-pgsql-debuginfoUpgrade apr-util-openssl-debuginfoUpgrade apr-util-openssl | Sep 15, 2026 | Sep 11, 2026 |
| Ubuntu | — | Upgrade libaprutil1Upgrade libaprutil1 (Ubuntu Pro)Upgrade libaprutil1t64 | Sep 14, 2026 | Sep 3, 2026 |
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