CVE-2026-76781CWE-476

CVE-2026-76781

Medium · published September 17, 2026

CVSS v3.1
5.5
EPSS
0%
Percentile
5.6
In the wild
Unconfirmed
What it is

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).

The record
Technical detail
CVSS v3.1
5.5 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00167 · 5.6th percentile
Weakness
CWE-476 · NULL Pointer Dereference
Published
2026-09-17T20:17Z
References (5)
https://access.redhat.com/errata/RHSA-2026:57604 · [email protected]https://access.redhat.com/security/cve/CVE-2026-76781 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2519776 · [email protected]https://gitlab.gnome.org/GNOME/libxml2/-/commit/c6324894 · [email protected]https://gitlab.gnome.org/GNOME/libxml2/-/merge_requests/442 · [email protected]
EPSS history
Timeline
  • 19 SEP 03:54Z
    EPSS moved — → 0%
    epss
  • 17 SEP 15:11Z
    Libxml2: libxml2: null pointer dereference parsing nextcatalog without catalog attribute
    cvelistv5