What’s Vulnerable › Vulnerabilities
CVE-2026-1858: wget2 Improper Certificate Validation
- Severity: medium (CVSS 4.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2026-04-29 · updated 2026-10-26
- Weakness: CWE-20
Description
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: through 2.2.1
References
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