Pillow up to 12.1.x PDF infinite loop

CVSS Meta Temp Score
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CTI Interest Score
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3.2$0-$5k0.00

Summaryinfo

A vulnerability was found in Pillow up to 12.1.x. It has been rated as problematic. This affects an unknown function of the component PDF Handler. This manipulation causes infinite loop. This vulnerability is registered as CVE-2026-42310. The attack needs to be launched locally. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in Pillow up to 12.1.x and classified as problematic. Affected by this vulnerability is an unknown function of the component PDF Handler. The manipulation with an unknown input leads to a infinite loop vulnerability. The CWE definition for the vulnerability is CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. As an impact it is known to affect availability. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-42310 since 04/26/2026. The exploitation appears to be easy. An attack has to be approached locally. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 313620 (Linux Distros Unpatched Vulnerability : CVE-2026-42310), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 12.2.0 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 3bf614e4b8615d0ce1d5039efaf6db447fe7c468 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (313620) and EUVD (EUVD-2026-28902). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 3.3
VulDB Meta Temp Score: 3.2

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Infinite loop
CWE: CWE-835 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 313620
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-42310

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Pillow 12.2.0
Patch: 3bf614e4b8615d0ce1d5039efaf6db447fe7c468

Timelineinfo

04/26/2026 CVE reserved
05/09/2026 +13 days Advisory disclosed
05/09/2026 +0 days VulDB entry created
05/10/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: GHSA-r73j-pqj5-w3x7
Status: Confirmed

CVE: CVE-2026-42310 (🔒)
GCVE (CVE): GCVE-0-2026-42310
GCVE (VulDB): GCVE-100-362425
EUVD: 🔒

Entryinfo

Created: 05/09/2026 09:03
Updated: 05/10/2026 00:51
Changes: 05/09/2026 09:03 (70), 05/09/2026 23:47 (1), 05/10/2026 00:51 (2)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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