All vulnerabilities
CVE-2026-104458GHSA-85f2-5r47-2pwm

YesWiki before 4.6.7 SSRF Guard Bypass via IPv6 Transition Addresses

YesWiki yeswiki
Open in ThreatlineRecord JSON
CVSS
8.3High
ExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 2 Oct 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.32%Chance of exploitation activity in the next 30 days, higher than 23% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in4.6.7Fixed versionCVE List
Published2 Oct 2026Updated 2 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

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.

Text from CVE List

Affected versions 2

  • yeswikiaffected: all versions before 4.6.7CVE List
  • yeswikiunaffected: 4.6.7CVE List

References 2