CVE-2026-42311
HIGH7.8EPSS 0.02%Pillow has an OOB Write with Invalid PSD Tile Extents (Integer Overflow)
Published: 5/4/2026Modified: 5/21/2026
Description
Pillow is a Python imaging library. From version 10.3.0 to before version 12.2.0, processing a malicious PSD file could lead to memory corruption, potentially resulting in a crash or arbitrary code execution. This issue has been patched in version 12.2.0.
Affected packages (3)
- Bitnami/pillow>= 10.3.0, < 12.2.0
- Debian/pillowfrom 0
- PyPI/pillow>= 10.3.0, < 12.2.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | HIGH7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
References (8)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-42311
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2026-42311
- PATCHhttps://github.com/python-pillow/Pillow
- WEBhttps://github.com/python-pillow/Pillow/commit/58f9a1d166dcb0c274807d4423522d205b0c35ea
- WEBhttps://github.com/python-pillow/Pillow/pull/9520
- WEBhttps://github.com/python-pillow/Pillow/releases/tag/12.2.0
- WEBhttps://github.com/python-pillow/Pillow/security/advisories/GHSA-cfh3-3jmp-rvhc
- WEBhttps://github.com/python-pillow/Pillow/security/advisories/GHSA-pwv6-vv43-88gr