Kanbn Kan vulnerabilities

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Published CVEs affecting Kanbn Kan: 3 record(s), with affected versions 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-2026-92802 Medium · 4.3 CWE-862 Sep 16, 2026

kan through 0.6.0 Authorization Bypass via GitHub Project Import

kan through 0.6.0 fails to properly validate board creation permissions in the GitHub project import endpoint, allowing guests to create boards despite lacking board:create permission. Attackers can bypass authorization checks by using the importProjects mutation to create boards while remaining blocked on direct creation paths.

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.).