{"id":"CVE-2026-110628","published":"2026-10-14T15:17:15.540","lastModified":"2026-10-16T18:17:32.790","description":"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.","cvssScore":8.6,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","cwes":["CWE-918"],"vendors":[],"products":[],"references":[{"url":"https://github.com/kanbn/kan","tags":[]},{"url":"https://github.com/kanbn/kan/blob/v0.6.0/.env.example#L25-L27","tags":[]},{"url":"https://github.com/kanbn/kan/blob/v0.6.0/apps/web/src/pages/api/download/attatchment.ts#L21-L52","tags":[]},{"url":"https://github.com/kanbn/kan/commit/53397d8e81dc1494d94132848c1f0416f1152bd7","tags":[]},{"url":"https://github.com/kanbn/kan/pull/590","tags":[]},{"url":"https://github.com/kanbn/kan/security/advisories/GHSA-qrx8-9hc6-jvqg","tags":[]},{"url":"https://hackmd.io/@leediay/HyIxU63ofg","tags":[]},{"url":"https://www.vulncheck.com/advisories/kan-0.5.5-through-0.6.0-unauthenticated-ssrf-via-api-download-attatchment","tags":[]}],"exploitRefs":[{"url":"https://github.com/kanbn/kan","tags":[]},{"url":"https://github.com/kanbn/kan/blob/v0.6.0/.env.example#L25-L27","tags":[]},{"url":"https://github.com/kanbn/kan/blob/v0.6.0/apps/web/src/pages/api/download/attatchment.ts#L21-L52","tags":[]},{"url":"https://github.com/kanbn/kan/commit/53397d8e81dc1494d94132848c1f0416f1152bd7","tags":[]},{"url":"https://github.com/kanbn/kan/pull/590","tags":[]},{"url":"https://github.com/kanbn/kan/security/advisories/GHSA-qrx8-9hc6-jvqg","tags":[]}],"hasPoc":true,"ai":null}