[xml/sgml-pkgs] Bug#1134866: libxml2: CVE-2026-6732

[Salvatore Bonaccorso]

Source: libxml2.9
Version: 2.15.2+dfsg-0.1
Severity: important
Tags: security upstream
Forwarded: https://gitlab.gnome.org/GNOME/libxml2/-/issues/1097
X-Debbugs-Cc: carnil at debian.org, Debian Security Team <team at security.debian.org>

Hi,

The following vulnerability was published for libxml2.

CVE-2026-6732[0]:
| A flaw was found in libxml2. This vulnerability occurs when the
| library processes a specially crafted XML Schema Definition (XSD)
| validated document that includes an internal entity reference. An
| attacker could exploit this by providing a malicious document,
| leading to a type confusion error that causes the application to
| crash. This results in a denial of service (DoS), making the
| affected system or application unavailable.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-6732
    https://www.cve.org/CVERecord?id=CVE-2026-6732
[1] https://gitlab.gnome.org/GNOME/libxml2/-/issues/1097
[2] https://gitlab.gnome.org/GNOME/libxml2/-/merge_requests/411

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore