CVE-2026-57062: Gnupg

Low severity, CVSS 2.9. EPSS: 0.1% chance of exploitation in the next 30 days.

CMS (Cryptographic Message Syntax) parsing in gpgsm in GnuPG through 2.5.20 mishandles the CMS format for AES-GCM because aes-ICVlen is supposed to be 12 bytes but 4 bytes is accepted. NOTE: this is related to CVE-2026-34182.

Affected products

• Gnupg Gnupg: up to and including 2.5.20

Published 2026-06-23. Last modified 2026-06-25.