parser.c in libxml2 before 2.9.5 mishandles parameter-entity references because the NEXTL macro calls the xmlParserHandlePEReference function in the case of a '%' character in a DTD name.
Fix
Patch, vendor advisory and mitigation references on NVD 4
- http://xmlsoft.org/news.html Release Notes, Vendor Advisory
- https://github.com/GNOME/libxml2/commit/e26630548e7d138d2c560844c43820b6767251e3 Patch, Third Party Advisory
- http://xmlsoft.org/news.html Release Notes, Vendor Advisory
- https://github.com/GNOME/libxml2/commit/e26630548e7d138d2c560844c43820b6767251e3 Patch, Third Party Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 9.8 · xmlsoftNVD modified 2026-10-14 07:16
Affected (CPE criteria) 1
cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:*
References 11
- http://xmlsoft.org/news.html Release Notes, Vendor Advisory
- https://bugzilla.gnome.org/show_bug.cgi?id=766956 Permissions Required
- https://github.com/GNOME/libxml2/commit/e26630548e7d138d2c560844c43820b6767251e3 Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2017/11/msg00041.html
- https://www.oracle.com//security-alerts/cpujul2021.html
- http://xmlsoft.org/news.html Release Notes, Vendor Advisory
- https://bugzilla.gnome.org/show_bug.cgi?id=766956 Permissions Required
- https://github.com/GNOME/libxml2/commit/e26630548e7d138d2c560844c43820b6767251e3 Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2017/11/msg00041.html
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html