{"id":"CVE-2026-68507","summary":"ideon: Unauthenticated /api/links/preview endpoint is an open SSRF relay, and its IP blocklist misses the 0.0.0.0/:: unspecified-address bypass","details":"ideon is a self-hosted visual workspace. Prior to version 0.9.5, ideon's link-preview endpoint requires no authentication at all and forwards any URL a caller supplies straight into a server-side fetch. The app does have a general-purpose SSRF guard (safeFetch/validateSafeUrl in src/app/lib/ssrf.ts), but this route sits behind no login check whatsoever, making it a fully open, anonymous URL-fetch relay - and the guard's IP blocklist itself has a gap that lets it reach the server's own loopback interface via the 0.0.0.0 \"any address\" bypass, a well-documented SSRF-filter evasion technique on Linux. This issue has been patched in version 0.9.5.","aliases":["GHSA-vpc2-r395-534p"],"modified":"2026-11-13T02:47:36.209269292Z","published":"2026-11-11T20:57:49.243Z","database_specific":{"cwe_ids":["CWE-306","CWE-918"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68507.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/3xpyth0n/ideon/releases/tag/v0.9.5"},{"type":"ADVISORY","url":"https://github.com/3xpyth0n/ideon/security/advisories/GHSA-vpc2-r395-534p"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68507.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68507"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/3xpyth0n/ideon","events":[{"introduced":"0"},{"fixed":"5e420c307c9d62a910457a34bb67cf3a091802f1"}],"database_specific":{"extracted_events":[{"range":[{"introduced":"0"},{"fixed":"0.9.5"}],"source":"AFFECTED_FIELD","strategy":"StringRangeExpression"},{"original_tag":"v0.9.5","range":[{"fixed":"5e420c307c9d62a910457a34bb67cf3a091802f1"}],"source":"REFERENCES_TAG"},{"range":[{"introduced":"0"},{"fixed":"0.9.5"}],"source":"DESCRIPTION"}]}}],"versions":["v0.9.4","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-2026-68507.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"}]}