CVE-2026-42311: Pillow has an OOB Write with Invalid PSD Tile Extents (Integer Overflow)

May 4, 2026

Processing a malicious PSD file could lead to memory corruption, potentially resulting in a crash or arbitrary code execution.

References

github.com/advisories/GHSA-pwv6-vv43-88gr
github.com/python-pillow/Pillow
github.com/python-pillow/Pillow/pull/9520
github.com/python-pillow/Pillow/security/advisories/GHSA-cfh3-3jmp-rvhc
github.com/python-pillow/Pillow/security/advisories/GHSA-pwv6-vv43-88gr
nvd.nist.gov/vuln/detail/CVE-2026-42311

Code Behaviors & Features

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