CVE-2026-76781

medium

Description

A flaw was found in libxml2. A local user or an attacker providing a specially crafted XML catalog can trigger a NULL pointer dereference during XML catalog parsing. This occurs when a `nextCatalog` element lacks its mandatory `catalog` attribute, leading to the application crashing and causing a Denial of Service (DoS).

References

https://gitlab.gnome.org/GNOME/libxml2/-/merge_requests/442

https://gitlab.gnome.org/GNOME/libxml2/-/commit/c6324894

https://bugzilla.redhat.com/show_bug.cgi?id=2519776

https://access.redhat.com/security/cve/CVE-2026-76781

Details

Source: Mitre, NVD

Published: 2026-09-17

Updated: 2026-09-18

Risk Information

CVSS v2

Base Score: 4.9

Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:C

Severity: Medium

CVSS v3

Base Score: 5.5

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Severity: Medium

EPSS

EPSS: 0.0016