CVE-2026-5186: Nothings Stb

Medium severity, CVSS 5.3. EPSS: 0.2% chance of exploitation in the next 30 days.

A weakness has been identified in Nothings stb up to 2.30. This impacts the function stbi__load_gif_main of the file stb_image.h of the component Multi-frame GIF File Handler. This manipulation causes double free. The attack requires local access. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products

• Nothings Stb: version 2.0 only; version 2.1 only; version 2.2 only; version 2.3 only; version 2.4 only; version 2.5 only; …

Published 2026-03-31. Last modified 2026-06-17.