CVE-2026-42311 PUBLISHED

Pillow: OOB Write with Invalid PSD Tile Extents (Integer Overflow)

Assigner: GitHub_M
Reserved: 26.04.2026 Published: 09.05.2026 Updated: 09.05.2026

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.

Metrics

CVSS 4.0

CVSS Vector: 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
CVSS Score: 8.6

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Local	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	python-pillow
Product	Pillow
Versions	Version >= 10.3.0, < 12.2.0 is affected

References

Problem Types

CWE-190: Integer Overflow or Wraparound CWE
CWE-787: Out-of-bounds Write CWE