CVE-2026-76781

5.5 mediumEPSS 0.2%

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).

Severity

CVSS 3.1

5.5 medium

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

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 5% of CVEs (scores of 2026-10-29)
CWE: CWE-476
Published: 2026-09-17
Modified: 2026-10-30
Record from: the NVD, synced 2026-10-30

References

https://access.redhat.com/errata/RHSA-2026:57604
https://access.redhat.com/security/cve/CVE-2026-76781
https://bugzilla.redhat.com/show_bug.cgi?id=2519776
https://gitlab.gnome.org/GNOME/libxml2/-/commit/c6324894
https://gitlab.gnome.org/GNOME/libxml2/-/merge_requests/442

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