CVE-2026-32255
HIGHKan is Vulnerable to Unauthenticated SSRF via Attachment Download Endpoint
Title source: cnaExploitation Summary
EIP tracks 1 public exploit for CVE-2026-32255. PoCs published by kOaDT.
AI-analyzed exploit summary This repository contains a functional proof-of-concept exploit for CVE-2026-32255, an SSRF vulnerability in Kan project management tool. The exploit demonstrates how an unauthenticated attacker can abuse the `/api/download/attatchment` endpoint to make arbitrary HTTP requests from the server and read internal service responses.
Description
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.).
Exploits (1)
This repository contains a functional proof-of-concept exploit for CVE-2026-32255, an SSRF vulnerability in Kan project management tool. The exploit demonstrates how an unauthenticated attacker can abuse the `/api/download/attatchment` endpoint to make arbitrary HTTP requests from the server and read internal service responses.
References (3)
Scores
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N