libxml2 vulnerabilities and fixes

CVEs that mention libxml2, ranked by priority. 2 tracked.

libxml2 has 2 tracked vulnerabilities, 1 critical. A fixed release or vendor patch exists for 2. Most recent: 2026-06-29. Highest priority: CVE-2026-6653 (score 52/100).

• CVE-2026-6653 CRITICAL 9.8 UPGRADE Use After Free in libxml2's xmlParseInternalSubset from GNOME libxml2 version 2.9.11 to 2.11.0 allows a remote
• CVE-2026-11979 HIGH 7.8 UPGRADE libxml2 is vulnerable to multiple stack-based buffer overflows in the xmlcatalog utility when running in --she

FAQ

How do I fix libxml2 vulnerabilities?

Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.

Is libxml2 being exploited right now?

None of the tracked libxml2 CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.

Which libxml2 CVE should I patch first?

CVE-2026-6653 currently ranks highest (52/100): Use After Free in libxml2's xmlParseInternalSubset from GNOME libxml2 version 2.9.11 to 2.11.0 allows a remote.

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