CVE-2026-32255
An unauthenticated attacker can use this to make HTTP requests from the server to internal services, cloud metadata endpoints, or private network resources.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 26.4%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
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.).
- CVSS 3.1
- 8.6 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
- EPSS
- 26.38% probability · 98th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-918
- Affected
- kan/kan
- Source
- security-advisories@github.com
EPSS moved from 1.7% on 24 September 2026 to 26.4% on 26 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- https://github.com/kanbn/kan/commit/53397d8e81dc1494d94132848c1f0416f1152bd7Patch
- https://github.com/kanbn/kan/releases/tag/v0.5.5Product, Release Notes
- https://github.com/kanbn/kan/security/advisories/GHSA-qrx8-9hc6-jvqgMitigation, Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.