CVE-2026-1858 MEDIUM

CVE-2026-1858: wget2 Improper Certificate Validation

Vendor Gnu
Product wget2
Weakness CWE-20 · Input validation
Published April 29, 2026
Last update April 30, 2026
View on NVD All CVEs

CVSS base score

4.8/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 29, 2026 CVE published
April 30, 2026 Record updated