Is CVE-2026-59205 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-59205?

CVE-2026-59205 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-59205

Description

Pillow is a Python imaging library. Prior to 12.3.0, Pillow's ImageCms.ImageCmsTransform.apply(im, imOut) API can trigger controlled native heap corruption when the caller supplies an output image whose mode does not match the transform's declared output mode. This issue is fixed in version 12.3.0.