CVE-2026-68507
ideon: Unauthenticated /api/links/preview endpoint is an open SSRF relay, and its IP blocklist misses the 0.0.0.0/:: unspecified-address bypass
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| ideon 3xpyth0n |
< 0.9.5 (affected) | CNA: GitHub_M |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 6.9 medium |
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 | CNA: GitHub_M |
| 4.0 / 6.9 medium |
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/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 | NVD: [email protected] |
Exploit evidence
- https://github.com/3xpyth0n/ideon/security/advisories/GHSA-vpc2-r395-534p
exploit · ADP: CISA-ADP
References
- https://github.com/3xpyth0n/ideon/security/advisories/GHSA-vpc2-r395-534pCNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/3xpyth0n/ideon/releases/tag/v0.9.5CNA: GitHub_M · x_refsource_MISC
- https://github.com/3xpyth0n/ideon/security/advisories/GHSA-vpc2-r395-534pADP: CISA-ADP · exploit
- https://github.com/3xpyth0n/ideon/releases/tag/v0.9.5[email protected]
- https://github.com/3xpyth0n/ideon/security/advisories/GHSA-vpc2-r395-534p[email protected]
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