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CVE-2026-59204

7.5 · HIGH

Pillow is a Python imaging library.

Published Jul 14, 2026CWE-789EPSS 0.39%

Overview

CVE-2026-59204 is a high-severity vulnerability. It was published on July 14, 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 8.2.0 through 12.2.0, src/libImaging/Jpeg2KDecode.c accumulates total_component_width across every tile in a JPEG2000 image instead of recomputing it per tile, allowing a crafted tiled JPEG2000 file to force substantially higher transient memory usage and trigger out-of-memory failures during decoding. This issue is fixed in version 12.3.0.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. 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.

References

GitHubgithub.com/python-pillow/Pillow/commit/13ada41172142f2fd9f0906f615a00ea623a11caGitHubgithub.com/python-pillow/Pillow/pull/9704GitHubgithub.com/python-pillow/Pillow/releases/tag/12.3.0GitHubgithub.com/python-pillow/Pillow/security/advisories/GHSA-vjc4-5qp5-m44jGitHubgithub.com/python-pillow/Pillow/security/advisories/GHSA-vjc4-5qp5-m44j

How CyberStrike helps

Frequently asked questions

What is CVE-2026-59204?

CVE-2026-59204 is a high-severity vulnerability. It was published on July 14, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-59204?

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-2026-59204?

Check the references section for vendor advisories, patches, and mitigation guidance. 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-2026-59204?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-59204 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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