{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-59197","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-07-02T19:53:48.831Z","datePublished":"2026-07-14T16:25:23.520Z","dateUpdated":"2026-07-21T18:50:40.019Z"},"containers":{"cna":{"title":"Pillow: Heap out-of-bounds write in Pillow `ImageFilter.RankFilter` via integer overflow in `ImagingExpand`","problemTypes":[{"descriptions":[{"cweId":"CWE-787","lang":"en","description":"CWE-787: Out-of-bounds Write","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-190","lang":"en","description":"CWE-190: Integer Overflow or Wraparound","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.2,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","version":"3.1"}}],"references":[{"name":"https://github.com/python-pillow/Pillow/security/advisories/GHSA-xj96-63gp-2gmr","tags":["x_refsource_CONFIRM"],"url":"https://github.com/python-pillow/Pillow/security/advisories/GHSA-xj96-63gp-2gmr"},{"name":"https://github.com/python-pillow/Pillow/pull/9695","tags":["x_refsource_MISC"],"url":"https://github.com/python-pillow/Pillow/pull/9695"},{"name":"https://github.com/python-pillow/Pillow/commit/cce3bdb867c77a3420261ed1bfdb6b0787ec8fc1","tags":["x_refsource_MISC"],"url":"https://github.com/python-pillow/Pillow/commit/cce3bdb867c77a3420261ed1bfdb6b0787ec8fc1"},{"name":"https://github.com/python-pillow/Pillow/releases/tag/12.3.0","tags":["x_refsource_MISC"],"url":"https://github.com/python-pillow/Pillow/releases/tag/12.3.0"}],"affected":[{"vendor":"python-pillow","product":"Pillow","versions":[{"version":"< 12.3.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-07-14T16:25:23.520Z"},"descriptions":[{"lang":"en","value":"Pillow is a Python imaging library. Prior to 12.3.0, Pillow's public rank-filter API can trigger a native heap out-of-bounds write when given a very large odd filter size because ImageFilter.RankFilter.filter() calls image.expand(size // 2, size // 2) before rank-filter size validation and ImagingExpand() computes output dimensions with unchecked signed int arithmetic. This issue is fixed in version 12.3.0."}],"source":{"advisory":"GHSA-xj96-63gp-2gmr","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/python-pillow/Pillow/security/advisories/GHSA-xj96-63gp-2gmr","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-21T18:50:30.849980Z","id":"CVE-2026-59197","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"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":"2026-07-21T18:50:40.019Z"}}]}}