{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-47251","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-05-18T22:54:18.273Z","datePublished":"2026-07-21T21:18:56.870Z","dateUpdated":"2026-07-22T13:48:12.355Z"},"containers":{"cna":{"title":"libheif has an incomplete fix for CVE-2026-3949: integer overflow bypass in vvdec_push_data2","problemTypes":[{"descriptions":[{"cweId":"CWE-125","lang":"en","description":"CWE-125: Out-of-bounds Read","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-190","lang":"en","description":"CWE-190: Integer Overflow or Wraparound","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"LOCAL","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"ACTIVE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.8,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"}}],"references":[{"name":"https://github.com/strukturag/libheif/security/advisories/GHSA-p6q9-fhf2-vj9v","tags":["x_refsource_CONFIRM"],"url":"https://github.com/strukturag/libheif/security/advisories/GHSA-p6q9-fhf2-vj9v"},{"name":"https://github.com/strukturag/libheif/issues/1712","tags":["x_refsource_MISC"],"url":"https://github.com/strukturag/libheif/issues/1712"}],"affected":[{"vendor":"strukturag","product":"libheif","versions":[{"version":"< 1.22.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-07-21T21:18:56.870Z"},"descriptions":[{"lang":"en","value":"libheif is a HEIF and AVIF file format decoder and encoder. The fix for CVE-2026-3949 (commit `b97c8b5`, PR #1712) introduced an integer overflow in the very security check it added. The check itself can be bypassed, allowing a crafted HEIF file with a VVC track to trigger the same out-of-bounds heap read that CVE-2026-3949 was meant to prevent. This is a separate, currently-unpatched vulnerability. Issue #1712 was closed as fixed without testing the edge case where `size` is near `UINT32_MAX`. Version 1.22.0 patches the issue."}],"source":{"advisory":"GHSA-p6q9-fhf2-vj9v","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/strukturag/libheif/security/advisories/GHSA-p6q9-fhf2-vj9v","tags":["exploit"]},{"url":"https://github.com/strukturag/libheif/issues/1712","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-22T13:38:27.784638Z","id":"CVE-2026-47251","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-07-22T13:48:12.355Z"}}]}}