What’s Vulnerable › Vulnerabilities

CVE-2026-112404: Pillow: OOB read in TiffDecode.c tile and RGBA paths leaks heap memory into pixels

• Severity: high (CVSS 8.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-10-19 · updated 2026-10-28
• Weakness: CWE-126

Description

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.

Affected products

• python-pillow Pillow: from 8.1.0 before 13.0.0 — fixed in 13.0.0
• Pypi Pillow: from 8.1.0 before 13.0.0; 10.0.0, 10.0.1, 10.1.0, 10.2.0, 10.3.0, 10.4.0 (+25) — fixed in 13.0.0
• python-pillow Pillow: from 8.1.0, < 13.0.0

How to fix

Upgrade to a fixed version: python-pillow Pillow 13.0.0; Pypi Pillow 13.0.0. Check the vendor advisory for mitigations.

References

• https://github.com/python-pillow/Pillow/commit/1d4773e6cea0c4a2814e6d4cdc099bbcf56da6ce
• https://github.com/python-pillow/Pillow/releases/tag/13.0.0
• https://github.com/python-pillow/Pillow/security/advisories/GHSA-c6hw-5grf-ff96
• https://github.com/python-pillow/Pillow/security/advisories/GHSA-c6hw-5grf-ff96

Get alerted when CVE-2026-112404 or the next vulnerability affects your stack