Medium severity6.5NVD Advisory· Published Oct 2, 2026· Updated Oct 2, 2026

CVE-2026-104458

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.

Affected products

Yeswiki/Yeswikillm-fuzzy
Range: <4.6.7

Patches

Vulnerability mechanics

References

github.com/YesWiki/yeswiki/security/advisories/GHSA-85f2-5r47-2pwmnvd
www.vulncheck.com/advisories/yeswiki-before-4.6.7-ssrf-guard-bypass-via-ipv6-transition-addressesnvd

News mentions

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cvss	0.423
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000