CVE-2026-6653 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-6653HIGH

GNOME libxml2 — libxml2: Use after free in xmlParseInternalSubset via improper entity resolution handling

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   H   N   N   N   H   L   L    7.0   .0036   28.8     —

AFFECTED
  Product  Versions  Fixed
  libxml2  2.9.11 –  —

TIMELINE
  Apr 20  Reserved by canonical
  Jun 22  EXPLOIT PUBLISHED — CVE-2026-6653 (GNOME libxml2). Public exploit reference added.
  Jun 22  Published (CNA: canonical)

CWE-416, CWE-611 · CNA: canonical · CVSS v4.0 · 2 references · NVD status: Analyzed

Description

Use After Free in libxml2's xmlParseInternalSubset from GNOME libxml2 version 2.9.11 to 2.11.0 allows a remote attacker to cause a denial-of-service via maliciously crafted XML input with improper entity resolution handling.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
April 20, 2026	Reserved	Reserved by canonical
June 22, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-6653 (GNOME libxml2). Public exploit reference added.
June 22, 2026	Published	Published (CNA: canonical)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
GNOME	libxml2	—	2.9.11	—

Weaknesses

CWE-416 · CWE-611

References (2)

https://bugs.launchpad.net/ubuntu/+source/libxml2/+bug/2141260 [Exploit, Issue Tracking, Third Party Advisory]
https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1058 [Exploit, Issue Tracking, Patch]

Authoritative record: CVE-2026-6653 at cve.org

Vendors: gnome

Weaknesses: CWE-416 · CWE-611

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-6653 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.