CVE-2026-1858: GNU WGET2

Medium severity, CVSS 4.8. EPSS: 0.2% chance of exploitation in the next 30 days.

wget2 accepts a server certificate with incorrect Key Usage (KU) or Extended Key Usage (EKU). If the attackers compromise a certificate (with the associated private key) issued for a different purpose, they may be able to reuse it for TLS server authentication.

Affected products

• GNU WGET2: up to and including 2.2.1

Published 2026-04-29. Last modified 2026-06-17.