{"id":"CVE-2026-104458","title":"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","summary":"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 cra…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","cwe":["CWE-918"],"vendor":"YesWiki","product":"yeswiki","affected":["yeswiki < 4.6.7"],"published":"2026-10-02","updated":"2026-10-02","sourceUpdated":"2026-10-02T15:17:07.810","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-104458","references":[{"url":"https://github.com/YesWiki/yeswiki/security/advisories/GHSA-85f2-5r47-2pwm","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/yeswiki-before-4.6.7-ssrf-guard-bypass-via-ipv6-transition-addresses","label":"disclosure@vulncheck.com"},{"url":"https://github.com/YesWiki/yeswiki/security/advisories/GHSA-85f2-5r47-2pwm","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-02T14:09:39.309988Z"},"ingestedAt":"2026-10-02T12:17:44.342Z","epss":0.00317,"epssPercentile":0.24484,"slug":"CVE-2026-104458","body":"## Overview\n\nYesWiki 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":214963,"id":"CVE-2026-104458","ts":1790954552998,"field":"exploit_available","old":"false","new":"true"}]}