Pillow is a Python imaging library. From 8.1.0 until 13.0.0, Pillow's TIFF tile and RGBA decode paths can read beyond row data produced by libtiff. In _decodeTile and the RGBA unpacker path, when Pillow and libtiff interpret duplicated PhotometricInterpretation or BitsPerSample tags differently, Pillow does not verify that the required input row fits inside the row libtiff produced, while the strip path has this validation. Loading pixels from such a crafted TIFF can expose adjacent heap data in output pixels or crash the process. This issue is fixed in version 13.0.0.
Fix
Patch, vendor advisory and mitigation references on NVD 3
- https://github.com/python-pillow/Pillow/commit/1d4773e6cea0c4a2814e6d4cdc099bbcf56da6ce Patch
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-c6hw-5grf-ff96 Exploit, Mitigation, Patch, Vendor Advisory
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-c6hw-5grf-ff96 Exploit, Mitigation, Patch, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 6
- StatusAnalyzed → ModifiedNVD modified 2026-10-28 16:17
- Cpes+1 CPE criteria (now 1)NVD modified 2026-10-27 15:00
- StatusUndergoing Analysis → AnalyzedNVD modified 2026-10-27 15:00
- StatusPublished → Undergoing AnalysisNVD modified 2026-10-20 19:48
- StatusReceived → PublishedNVD modified 2026-10-19 21:27
- First seenCVSS 8.8NVD modified 2026-10-19 22:17
Affected (CPE criteria) 1
cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:*
References 4
- https://github.com/python-pillow/Pillow/commit/1d4773e6cea0c4a2814e6d4cdc099bbcf56da6ce Patch
- https://github.com/python-pillow/Pillow/releases/tag/13.0.0 Release Notes
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-c6hw-5grf-ff96 Exploit, Mitigation, Patch, Vendor Advisory
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-c6hw-5grf-ff96 Exploit, Mitigation, Patch, Vendor Advisory