CVE-2026-104458CWE-918ssrf

CVE-2026-104458

Medium · published October 2, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
23.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
CVSS v4.0
8.3 · CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS
0.00317 · 23.4th percentile
Weakness
CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-10-02T16:17Z
References (3)
https://github.com/YesWiki/yeswiki/security/advisories/GHSA-85f2-5r47-2pwm · [email protected]https://www.vulncheck.com/advisories/yeswiki-before-4.6.7-ssrf-guard-bypass-via-ipv6-transition-addresses · [email protected]https://github.com/YesWiki/yeswiki/security/advisories/GHSA-85f2-5r47-2pwm · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 04 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 02 OCT 11:38Z
    YesWiki before 4.6.7 SSRF Guard Bypass via IPv6 Transition Addresses
    cvelistv5