CVE-2026-42311
Pillow: OOB Write with Invalid PSD Tile Extents (Integer Overflow)
7.8
HIGH
CVSS 3.1
EPSS 0.15%
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.
How to fix CVE-2026-42311
To remediate CVE-2026-42311, upgrade the affected package to a fixed version below.
- —upgrade to 12.2.0 or later
- —upgrade to 12.2.0 or later
- —upgrade to 12.2.0 or later
Is CVE-2026-42311 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- >= 10.3.0, < 12.2.0
- >= 10.3.0, < 12.2.0
- >= 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 |