CVE-2026-104458: Yeswiki

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

YesWiki before 4.6.7 contains a server-side request forgery vulnerability in validateKeyIdUrl() that allows unauthenticated attackers to bypass the SSRF guard using 6to4, NAT64, or IPv4-compatible IPv6 addresses. Attackers can send a crafted Signature keyId to the public actor inbox route to reach cloud metadata, loopback services, or internal hosts.

Affected products

• Yeswiki Yeswiki: before 4.6.7 (fixed in 4.6.7)

Published 2026-10-02. Last modified 2026-10-02.