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CVE-2026-78465

7.0 · HIGH

A flaw was found in the file-pcx plugin in GIMP, affecting 32-bit builds only.

Published Aug 24, 2026CWE-190EPSS 0.28%

Overview

CVE-2026-78465 is a high-severity vulnerability. It was published on August 24, 2026 and has a CVSS 3.1 base score of 7.0 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.0, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

A flaw was found in the file-pcx plugin in GIMP, affecting 32-bit builds only. When processing a PCX image file, the plugin calculates memory allocation sizes based on the image dimensions and the number of color planes. If a crafted file sets the number of planes to 4 alongside sufficiently large dimensions, the calculation exceeds the 32-bit integer limit and overflows, resulting in an undersized heap-based buffer allocation. This integer overflow issue results in a heap-based buffer overflow when the plugin subsequently writes image data into the undersized buffer, causing memory corruption, potentially leading to arbitrary code execution or a denial of service.

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

Refaccess.redhat.com/security/cve/CVE-2026-78465Refbugzilla.redhat.com/show_bug.cgi?id=2522057Refgitlab.gnome.org/GNOME/gimp/-/work_items/16578Refgitlab.gnome.org/GNOME/gimp/-/work_items/16578

How CyberStrike helps

Frequently asked questions

What is CVE-2026-78465?

CVE-2026-78465 is a high-severity vulnerability. It was published on August 24, 2026 and has a CVSS 3.1 base score of 7.0 (HIGH).

How severe is CVE-2026-78465?

This vulnerability has a CVSS 3.1 base score of 7.0, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-78465?

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-2026-78465?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-78465 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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