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1 vulnerability by kanbn

CVE-2026-32255 (GCVE-0-2026-32255)

Vulnerability from cvelistv5 – Published: 2026-03-18 23:11 – Updated: 2026-03-19 16:11
VLAI?
Title
Kan is Vulnerable to Unauthenticated SSRF via Attachment Download Endpoint
Summary
Kan is an open-source project management tool. In versions 0.5.4 and below, the /api/download/attatchment endpoint has no authentication and no URL validation. The Attachment Download endpoint accepts a user-supplied URL query parameter and passes it directly to fetch() server-side, and returns the full response body. An unauthenticated attacker can use this to make HTTP requests from the server to internal services, cloud metadata endpoints, or private network resources. This issue has been fixed in version 0.5.5. To workaround this issue, block or restrict access to /api/download/attatchment at the reverse proxy level (nginx, Cloudflare, etc.).
Severity ?
8.6 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
Impacted products
Vendor Product Version
kanbn kan Affected: < 0.5.5
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