CVEvulnerability
CVE-2026-110628
9.2 CRITICAL
Official page ↗
- Status
- Deferred
- Published
- 2026-10-14
- Last modified
- 2026-10-16
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 9.2 CRITICAL — CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/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
- CVSS 3.1 ([email protected])
- 8.6 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
- Weaknesses
- CWE-918
Description
Kan 0.5.5 through 0.6.0 contains an unauthenticated server-side request forgery vulnerability in the /api/download/attatchment route due to an incomplete fix for CVE-2026-32255. When S3_ENDPOINT is unset, attackers can pass arbitrary url query parameters to fetch() to read internal services, localhost ports, and cloud instance metadata.
Related
Weakness · CWE (1)
- CWE-918 Server-Side Request Forgery weakness
References
- https://github.com/kanbn/kan github.com
- https://github.com/kanbn/kan/blob/v0.6.0/.env.example#L25-L27 github.com
- https://github.com/kanbn/kan/blob/v0.6.0/apps/web/src/pages/api/download/attatchment.ts#L21-L52 github.com
- https://github.com/kanbn/kan/commit/53397d8e81dc1494d94132848c1f0416f1152bd7 github.com
- https://github.com/kanbn/kan/pull/590 github.com
- https://github.com/kanbn/kan/security/advisories/GHSA-qrx8-9hc6-jvqg github.com
- https://hackmd.io/@leediay/HyIxU63ofg hackmd.io
- https://www.vulncheck.com/advisories/kan-0.5.5-through-0.6.0-unauthenticated-ssrf-via-api-download-attatchment www.vulncheck.com