CVE-2026-42308

A flaw was found in Pillow, a Python imaging library. If a font advances for each glyph by an exceeding large amount, an integer overflow can occur when Pillow tracks the current position. This could lead to a denial of service (DoS) condition, making the application unavailable.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

To mitigate this issue, ensure that applications utilizing the Pillow library do not process untrusted or maliciously crafted font files. Additionally, consider running applications that process image data in a sandboxed environment to limit potential impact. Reloading or restarting affected services may be required for changes to take effect.