CVE-2026-110628

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.

CVSS v3 8.6 HIGH

8.6^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 4.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/kanbn/kan
https://github.com/kanbn/kan/blob/v0.6.0/.env.example#L25-L27
https://github.com/kanbn/kan/blob/v0.6.0/apps/web/src/pages/api/download/attatchment.ts#L21-L52
https://github.com/kanbn/kan/commit/53397d8e81dc1494d94132848c1f0416f1152bd7
https://github.com/kanbn/kan/pull/590
https://github.com/kanbn/kan/security/advisories/GHSA-qrx8-9hc6-jvqg
https://hackmd.io/@leediay/HyIxU63ofg
https://www.vulncheck.com/advisories/kan-0.5.5-through-0.6.0-unauthenticated-ssrf-via-api-download-attatchment

Configurations

No configuration.

History

14 Oct 2026, 15:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-14 15:17

Updated : 2026-10-16 18:17

NVD link : CVE-2026-110628

Mitre link : CVE-2026-110628

CVE.ORG link : CVE-2026-110628

JSON object : View

Products Affected

No product.

CWE

CWE-918

Server-Side Request Forgery (SSRF)

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