medium4.8
CVE-2026-1858
wget2 accepts a server certificate with incorrect Key Usage (KU) or Extended Key Usage (EKU).
Impact
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
| Vendor | Product | Affected versions |
|---|---|---|
| Gnu | Wget2 | through 2.2.1 |