{"id":"CVE-2026-32255","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-32255","generatedAt":"2026-10-28T01:19:16.829Z","title":"An unauthenticated attacker can use this to make HTTP requests from the server to internal services, cloud metadata endpoints, or private network resources.","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.).","published":"2026-03-19T00:16:18.000Z","lastModified":"2026-06-17T10:35:26.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":8.6,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N"},"cwe":["CWE-918"],"affected":["kan/kan"],"epss":{"score":0.2638,"percentile":0.97994,"date":"2026-10-26","history":[{"date":"2026-09-24","score":0.01744,"percentile":0.76773},{"date":"2026-10-25","score":0.2638,"percentile":0.97993}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"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."},"changes":[{"kind":"epss","label":"EPSS jump","at":"2026-10-25T00:00:00.000Z","detail":{"to":0.2638,"from":0.01744,"percentile":0.97993},"summary":"EPSS moved from 1.7% to 26.4% probability of exploitation in the next thirty days."}],"references":[{"url":"https://github.com/kanbn/kan/commit/53397d8e81dc1494d94132848c1f0416f1152bd7","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/kanbn/kan/releases/tag/v0.5.5","tags":["Product","Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/kanbn/kan/security/advisories/GHSA-qrx8-9hc6-jvqg","tags":["Mitigation","Patch","Vendor Advisory"],"source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-32255","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}