{"id":"CVE-2026-65968","summary":"ideon: Unauthenticated SSRF in /api/proxy/image via WHATWG bracketed/hex-mapped IPv6 bypass of isSafeUrl guard","details":"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.","aliases":["GHSA-cvcr-fcf6-366r"],"modified":"2026-11-14T02:30:30.996098919Z","published":"2026-11-11T20:57:39.798Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65968.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-918"]},"references":[{"type":"WEB","url":"https://github.com/3xpyth0n/ideon/releases/tag/v0.9.4"},{"type":"ADVISORY","url":"https://github.com/3xpyth0n/ideon/security/advisories/GHSA-cvcr-fcf6-366r"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65968.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-65968"},{"type":"FIX","url":"https://github.com/3xpyth0n/ideon/commit/58e2f26bb7259d24c963a753962ac34f56c63b01"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/3xpyth0n/ideon","events":[{"introduced":"0"},{"fixed":"63cc5c1a886fc6408ac56979f136177cea060b48"},{"fixed":"58e2f26bb7259d24c963a753962ac34f56c63b01"}],"database_specific":{"extracted_events":[{"range":[{"introduced":"0"},{"fixed":"0.9.4"}],"source":"AFFECTED_FIELD","strategy":"StringRangeExpression"},{"range":[{"fixed":"58e2f26bb7259d24c963a753962ac34f56c63b01"}],"source":"REFERENCES_COMMIT"},{"original_tag":"v0.9.4","range":[{"fixed":"63cc5c1a886fc6408ac56979f136177cea060b48"}],"source":"REFERENCES_TAG"}]}}],"versions":["v0.9.3","v0.9.2","v0.9.1","v0.9.0","v0.8.6","v0.8.5","v0.8.3","v0.8.2","v0.8.1","v0.8.0","v0.7.7","v0.7.6","v0.7.5","v0.7.4","v0.7.3","v0.7.2","v0.7.1","v0.7.0","v0.6.2","v0.6.1","v0.6.0","v0.5.4","v0.5.1","v0.5.0","v0.4.5","v0.4.4","v0.4.3","v0.4.2","v0.4.1","v0.4.0","v0.3.3","v0.3.2","v0.3.0","v0.2.8","v0.2.7","v0.2.6","v0.2.5","v0.2.3","v0.2.2","v0.2.0","v0.1.7","v0.1.6","v0.1.5","v0.1.4","v0.1.3","v0.1.2","v0.1.1","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-65968.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V4","score":"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"}]}