CVE-2026-26740: Giflib Project Giflib

High severity, CVSS 8.2. EPSS: 1% chance of exploitation in the next 30 days.

Buffer Overflow vulnerability in giflib v.5.2.2 allows a remote attacker to cause a denial of service via the EGifGCBToExtension overwriting an existing Graphic Control Extension block without validating its allocated size.

Affected products

• Giflib Project Giflib: version 5.2.2 only

Published 2026-03-18. Last modified 2026-07-23.