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CVE-2026-6653

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 PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:87ff896abde0f57a761f8f8171b36ba9ce484159478e28bafcc23e4a62f6728f
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-611","description":"CWE-611 Improper Restriction of XML External Entity Processing","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ee2b52165fc8ff3af732779f803c974c2606a2c5b576faa4b114f341a7d0076b · sha256:4f81ca9755ba5023… · /containers/cna/problemTypes/0/descriptions/1

{"cweId":"CWE-416","description":"CWE-416 Use after free","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ee2b52165fc8ff3af732779f803c974c2606a2c5b576faa4b114f341a7d0076b · sha256:4f81ca9755ba5023… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","packageName":"libxml2","product":"libxml2","repo":"https://gitlab.gnome.org/GNOME/libxml2","vendor":"GNOME","versions":[{"lessThan":"2.11.0","status":"affected","version":"2.9.11","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ee2b52165fc8ff3af732779f803c974c2606a2c5b576faa4b114f341a7d0076b · sha256:4f81ca9755ba5023… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":7,"baseSeverity":"HIGH","exploitMaturity":"PROOF_OF_CONCEPT","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityIm…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ee2b52165fc8ff3af732779f803c974c2606a2c5b576faa4b114f341a7d0076b · sha256:4f81ca9755ba5023… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-611","description":"CWE-611 Improper Restriction of XML External Entity Processing","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ee2b52165fc8ff3af732779f803c974c2606a2c5b576faa4b114f341a7d0076b · sha256:4f81ca9755ba5023… · /containers/cna/problemTypes/0/descriptions/1
{"cweId":"CWE-416","description":"CWE-416 Use after free","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ee2b52165fc8ff3af732779f803c974c2606a2c5b576faa4b114f341a7d0076b · sha256:4f81ca9755ba5023… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["issue-tracking"],"url":"https://bugs.launchpad.net/ubuntu/+source/libxml2/+bug/2141260"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ee2b52165fc8ff3af732779f803c974c2606a2c5b576faa4b114f341a7d0076b · sha256:4f81ca9755ba5023… · /containers/cna/references/0
{"tags":["issue-tracking"],"url":"https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1058"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ee2b52165fc8ff3af732779f803c974c2606a2c5b576faa4b114f341a7d0076b · sha256:4f81ca9755ba5023… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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