What’s Vulnerable › Vulnerabilities
CVE-2026-25898: Imagemagick Has Global Buffer Overflow (OOB Read) via Negative Pixel Index in UIL and XPM Writer
- Severity: critical (CVSS 9.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-02-24 · updated 2026-06-17
- Weakness: CWE-125
Description
ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 7.1.2-15 and 6.9.13-40, the UIL and XPM image encoder do not validate the pixel index value returned by `GetPixelIndex()` before using it as an array subscript. In HDRI builds, `Quantum` is a floating-point type, so pixel index values can be negative. An attacker can craft an image with negative pixel index values to trigger a global buffer overflow read during conversion, leading to information disclosure or a process crash. Versions 7.1.2-15 and 6.9.13-40 contain a patch.
Affected products
- ImageMagick: before 6.9.13-40; from 7.0.0-0 before 7.1.2-15 — fixed in 6.9.13-40, 7.1.2-15
How to fix
Upgrade to a fixed version: ImageMagick 6.9.13-40, 7.1.2-15. Check the vendor advisory for mitigations.
References
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