PT-2026-36003 · Wget2 · Wget2

Published 2026-04-29 · Updated 2026-05-05 · CVE-2026-1858

Positive Technologies (AI Summary)

CVSS v3.1

4.8

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions wget2 (affected versions not specified)

Description An issue exists where the software accepts server certificates with incorrect Key Usage (KU) or Extended Key Usage (EKU). This could allow an attacker who has compromised a certificate and its associated private key issued for a different purpose to reuse it for TLS server authentication, potentially bypassing certificate validation.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CVE-2026-1858

Affected Products

Wget2

References · 9

• 🔥 https://tenable.com/security/research/tra-2026-37 · Exploit
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-1858 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-1858 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-1858 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-1858 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-1858 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-1858 · Vendor Advisory
• https://t.me/cveNotify/162118 · Telegram Post
• https://twitter.com/VulmonFeeds/status/2049667579384361037 · Twitter Post