{"affected":[{"product":"ideon","source":"CNA: GitHub_M","vendor":"3xpyth0n","versions":[{"status":"affected","version":"< 0.9.4"}]}],"cveId":"CVE-2026-65968","cwes":["CWE-918"],"description":"ideon is a self-hosted visual workspace. Prior to version 0.9.4, validateUrlForSSRF() / safeFetch() in lib/oauth/ssrf-protection.ts (and the parallel validateMcpUrl() in lib/security/validators.ts) perform SSRF host-blocking by string/regex matching on new URL(url).hostname. Their IPv6 branch only recognises the textual forms ::1, fe80:/fc00:/fd00: prefixes, and the dotted-decimal IPv4-mapped form ::ffff:127.x. It does not recognise the WHATWG-canonical IPv4-mapped-IPv6 host that Node emits for a mapped address, which is hex-compressed and bracket-wrapped: [::ffff:7f00:1] for 127.0.0.1, [::ffff:a9fe:a9fe] for 169.254.169.254. An authenticated user who registers a STREAMABLE_HTTP / SSE MCP server with URL http://[::ffff:7f00:1]:PORT/ (loopback) or http://[::ffff:a9fe:a9fe]/ (cloud metadata) passes both guards, and the server-side OAuth-discovery action then fetches that host, yielding server-side request forgery to loopback and to the cloud metadata service. This issue has been patched in version 0.9.4.","epss":{"date":"2026-11-12","percentile":0.24291,"score":0.00311},"exploits":[],"kev":null,"metrics":[{"score":5.3,"severity":"medium","source":"CNA: GitHub_M","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},{"score":5.3,"severity":"medium","source":"NVD: security-advisories@github.com","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"}],"modifiedAt":1794528344376,"publishedAt":1794430659798,"references":[{"source":"CNA: GitHub_M","tags":["x_refsource_CONFIRM"],"url":"https://github.com/3xpyth0n/ideon/security/advisories/GHSA-cvcr-fcf6-366r"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/3xpyth0n/ideon/commit/58e2f26bb7259d24c963a753962ac34f56c63b01"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/3xpyth0n/ideon/releases/tag/v0.9.4"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/3xpyth0n/ideon/commit/58e2f26bb7259d24c963a753962ac34f56c63b01"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/3xpyth0n/ideon/releases/tag/v0.9.4"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/3xpyth0n/ideon/security/advisories/GHSA-cvcr-fcf6-366r"}],"remediation":[],"revision":"e5125e3e6bffb56fa6f64c9b9773efddacdb2955ff293bfb570b7203b468b7a6","sources":[{"modifiedAt":1794528344376,"name":"CNA: GitHub_M","retrievedAt":1794532192312,"url":"https://www.cve.org/CVERecord?id=CVE-2026-65968"},{"modifiedAt":1794521931470,"name":"NVD","retrievedAt":1794529416715,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-65968"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794532209002,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-65968"}],"ssvc":{"assessedAt":1794528332653,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"ideon: Unauthenticated SSRF in /api/proxy/image via WHATWG bracketed/hex-mapped IPv6 bypass of isSafeUrl guard","updatedAt":1794532209002}