CVE-2026-42310
Pillow: PDF Parsing Trailer Infinite Loop (DoS)
Description
Pillow is a Python imaging library. From version 4.2.0 to before version 12.2.0, an attacker can supply a malicious PDF that causes the process to hang indefinitely, consuming 100% CPU and making the application unresponsive. This issue has been patched in version 12.2.0.
INFO
Published Date :
May 9, 2026, 6:16 a.m.
Last Modified :
May 12, 2026, 5:55 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update Pillow to version 12.2.0 or later.
- Ensure PDF processing code is secure.
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-2026-42310.
| URL | Resource |
|---|---|
| https://github.com/python-pillow/Pillow/commit/3bf614e4b8615d0ce1d5039efaf6db447fe7c468 | Patch |
| https://github.com/python-pillow/Pillow/pull/9519 | 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-r73j-pqj5-w3x7 | 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-2026-42310 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-2026-42310
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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-42310 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-42310 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. 12, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CPE Configuration OR *cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:* versions from (including) 4.2.0 up to (excluding) 12.2.0 Added Reference Type GitHub, Inc.: https://github.com/python-pillow/Pillow/commit/3bf614e4b8615d0ce1d5039efaf6db447fe7c468 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/python-pillow/Pillow/pull/9519 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-r73j-pqj5-w3x7 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 4.2.0 to before version 12.2.0, an attacker can supply a malicious PDF that causes the process to hang indefinitely, consuming 100% CPU and making the application unresponsive. 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:N/VI:N/VA:L/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-835 Added Reference https://github.com/python-pillow/Pillow/commit/3bf614e4b8615d0ce1d5039efaf6db447fe7c468 Added Reference https://github.com/python-pillow/Pillow/pull/9519 Added Reference https://github.com/python-pillow/Pillow/releases/tag/12.2.0 Added Reference https://github.com/python-pillow/Pillow/security/advisories/GHSA-r73j-pqj5-w3x7