CVE-2026-5185 Nothings stb_image Multi-frame GIF File stb_image.h stbi__gif_load_next heap-based overflow
A heap-based buffer overflow in the stb_image library allows local attackers to execute arbitrary code or cause denial of service via malicious GIF files.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-5185?
CVE-2026-5185 is a medium-severity memory corruption vulnerability in Nothings stb_image, published on 31 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A security flaw has been discovered in Nothings stb_image up to 2.30. This affects the function stbi__gif_load_next of the file stb_image.h of the component Multi-frame GIF File Handler. The manipulation results in heap-based buffer overflow. The attack requires a local approach. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-5185?
How do I fix CVE-2026-5185?
No fix has been published for CVE-2026-5185 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-5185 being exploited?
There is no known exploitation of CVE-2026-5185 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-5185, GHSA-ccf6-mw22-wphc, UBUNTU-CVE-2026-5185.