CVE-2026-42311
Pillow: OOB Write with Invalid PSD Tile Extents (Integer Overflow)
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.
INFO
Published Date :
May 9, 2026, 6:16 a.m.
Last Modified :
May 14, 2026, 8:27 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update Pillow to version 12.2.0 or later.
- Review application dependencies for Pillow usage.
- Test updated Pillow in a staging environment.
Public PoC/Exploit Available at Github
CVE-2026-42311 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-42311.
| URL | Resource |
|---|---|
| https://github.com/python-pillow/Pillow/commit/58f9a1d166dcb0c274807d4423522d205b0c35ea | Patch |
| https://github.com/python-pillow/Pillow/pull/9520 | Issue Tracking Patch |
| https://github.com/python-pillow/Pillow/releases/tag/12.2.0 | Product Release Notes |
| https://github.com/python-pillow/Pillow/security/advisories/GHSA-pwv6-vv43-88gr | Patch Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-42311 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-42311
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Security vulnerability disclosures and advisories by Ethan Taebeom Kim (Cremit)
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-42311 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-42311 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
May. 14, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:* versions from (including) 10.3.0 up to (excluding) 12.2.0 Added Reference Type GitHub, Inc.: https://github.com/python-pillow/Pillow/commit/58f9a1d166dcb0c274807d4423522d205b0c35ea Types: Patch Added Reference Type GitHub, Inc.: https://github.com/python-pillow/Pillow/pull/9520 Types: Issue Tracking, Patch Added Reference Type GitHub, Inc.: https://github.com/python-pillow/Pillow/releases/tag/12.2.0 Types: Product, Release Notes Added Reference Type GitHub, Inc.: https://github.com/python-pillow/Pillow/security/advisories/GHSA-pwv6-vv43-88gr Types: Patch, Vendor Advisory -
New CVE Received by [email protected]
May. 09, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-787 Added CWE CWE-190 Added Reference https://github.com/python-pillow/Pillow/commit/58f9a1d166dcb0c274807d4423522d205b0c35ea Added Reference https://github.com/python-pillow/Pillow/pull/9520 Added Reference https://github.com/python-pillow/Pillow/releases/tag/12.2.0 Added Reference https://github.com/python-pillow/Pillow/security/advisories/GHSA-pwv6-vv43-88gr