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CVE-2026-112391

7.5 · HIGH

Pillow is a Python imaging library.

Published Oct 19, 2026pythonCWE-835EPSS 0.58%

Overview

CVE-2026-112391 is a high-severity vulnerability affecting python pillow. It was published on October 19, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Pillow is a Python imaging library. From 5.1.0 until 13.0.0, Pillow's PdfParser.get_value() can recurse without a limit while reading nested PDF objects. The parser follows attacker-controlled arrays and dictionaries when an existing PDF is opened for append. An attacker can provide a deeply nested PDF to an application that saves an image with PDF append enabled. This can raise an uncaught RecursionError or terminate the worker, causing denial of service. This issue is fixed in version 13.0.0.

Remediation

Check the references section for vendor advisories and patches from python. Update pillow to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
pythonpillow>= 5.1.0, < 13.0.0Affected

References

GitHubgithub.com/python-pillow/Pillow/commit/94cb11c44ff7345414da17ebfea1598a529ad9cdGitHubgithub.com/python-pillow/Pillow/releases/tag/13.0.0GitHubgithub.com/python-pillow/Pillow/security/advisories/GHSA-254f-3936-288h

How CyberStrike helps

Frequently asked questions

What is CVE-2026-112391?

CVE-2026-112391 is a high-severity vulnerability affecting python pillow. It was published on October 19, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-112391?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-112391?

Check the references section for vendor advisories and patches from python. Update pillow to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-112391?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-112391 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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