{"id":"CVE-2026-128067","state":"PUBLISHED","title":"Pillow: Heap buffer overflow saving TIFF with libtiff when tags override image size","description":"Pillow is a Python imaging library. From 2.3.0 through 12.3.0, Pillow applications that save compressed TIFF images through libtiff can pass attacker-controlled image geometry tags to the encoder while allocating its row buffer from the actual image dimensions. The affected TiffImagePlugin._save path allows ImageWidth, ImageLength, or SamplesPerPixel from exif=, tiffinfo=, or a source TIFF IFD to make libtiff consume a larger scanline than the buffer supplied by ImagingLibTiffEncode. This can read heap memory into the generated TIFF or crash the process. When TIFF Predictor 2 is enabled, libtiff can rewrite the oversized scanline in place and corrupt memory beyond the buffer. A carried-over PlanarConfiguration value of 2 instead makes libtiff use a shorter scanline and can produce an undecodable output file, but is not established to cause the out-of-bounds access. This issue is fixed in version 13.0.0.","publishedAt":"2026-11-12T22:49:58.221Z","updatedAt":"2026-11-12T22:49:58.221Z","severity":{"score":8.4,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:H/SC:N/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["python-pillow Pillow"],"affected":[{"vendor":"python-pillow","product":"Pillow","versions":[{"version":">= 2.3.0, < 13.0.0","status":"affected"}]}],"references":["https://github.com/python-pillow/Pillow/security/advisories/GHSA-xcvg-w56q-r89m","https://github.com/python-pillow/Pillow/commit/53318b50e8e9e85a57d033d4d879e1398d97aeb1","https://github.com/python-pillow/Pillow/commit/ec5f1cbcf67275641abaad5c065ffb64a0a804a9","https://github.com/python-pillow/Pillow/releases/tag/13.0.0"],"weaknesses":["CWE-787"],"ingestedAt":"2026-11-12T23:00:07.221Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/128xxx/CVE-2026-128067.json","commit":"e9396ca3a88fb7780747138b4df4f4c5a3256044","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-128067","state":"PUBLISHED","datePublished":"2026-11-12T22:49:58.221Z","dateUpdated":"2026-11-12T22:49:58.221Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-11-12T21:24:51.129Z"},"containers":{"cna":{"title":"Pillow: Heap buffer overflow saving TIFF with libtiff when tags override image size","descriptions":[{"lang":"en","value":"Pillow is a Python imaging library. From 2.3.0 through 12.3.0, Pillow applications that save compressed TIFF images through libtiff can pass attacker-controlled image geometry tags to the encoder while allocating its row buffer from the actual image dimensions. The affected TiffImagePlugin._save path allows ImageWidth, ImageLength, or SamplesPerPixel from exif=, tiffinfo=, or a source TIFF IFD to make libtiff consume a larger scanline than the buffer supplied by ImagingLibTiffEncode. This can read heap memory into the generated TIFF or crash the process. When TIFF Predictor 2 is enabled, libtiff can rewrite the oversized scanline in place and corrupt memory beyond the buffer. A carried-over PlanarConfiguration value of 2 instead makes libtiff use a shorter scanline and can produce an undecodable output file, but is not established to cause the out-of-bounds access. This issue is fixed in version 13.0.0."}],"affected":[{"vendor":"python-pillow","product":"Pillow","versions":[{"version":">= 2.3.0, < 13.0.0","status":"affected"}]}],"references":[{"url":"https://github.com/python-pillow/Pillow/security/advisories/GHSA-xcvg-w56q-r89m","name":"https://github.com/python-pillow/Pillow/security/advisories/GHSA-xcvg-w56q-r89m","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/python-pillow/Pillow/commit/53318b50e8e9e85a57d033d4d879e1398d97aeb1","name":"https://github.com/python-pillow/Pillow/commit/53318b50e8e9e85a57d033d4d879e1398d97aeb1","tags":["x_refsource_MISC"]},{"url":"https://github.com/python-pillow/Pillow/commit/ec5f1cbcf67275641abaad5c065ffb64a0a804a9","name":"https://github.com/python-pillow/Pillow/commit/ec5f1cbcf67275641abaad5c065ffb64a0a804a9","tags":["x_refsource_MISC"]},{"url":"https://github.com/python-pillow/Pillow/releases/tag/13.0.0","name":"https://github.com/python-pillow/Pillow/releases/tag/13.0.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.4,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:H/SC:N/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-787","lang":"en","description":"CWE-787: Out-of-bounds Write","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-11-12T22:49:58.221Z"},"source":{"advisory":"GHSA-xcvg-w56q-r89m","discovery":"UNKNOWN"}}}}}