CVE-2026-43861: Mutt

Low severity, CVSS 3.7. EPSS: 0.3% chance of exploitation in the next 30 days.

mutt before 2.3.2 does not check for '\0' in url_pct_decode.

Affected products

• Mutt Mutt: before 2.3.2 (fixed in 2.3.2)

Published 2026-05-04. Last modified 2026-06-17.