Kanbn vulnerabilities
Published CVEs affecting Kanbn products: 2 record(s), with severity, exploitation and fixes.
CVE-2026-110628
High · 8.6
CWE-918 Oct 14, 2026
Kan 0.5.5 through 0.6.0 Unauthenticated SSRF via /api/download/attatchment
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.
CVE-2026-32255
High · 8.6
Public exploit CWE-918 Mar 18, 2026
Kan is Vulnerable to Unauthenticated SSRF via Attachment Download Endpoint
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.).