{"id":"CVE-2026-111618","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-111618","generatedAt":"2026-10-27T23:51:20.590Z","title":"CoAI (Chat Nio) through 4.0.0 contains an unauthenticated path traversal vulnerability in the generation and article archive download endpoints via the hash query parameter.","description":"CoAI (Chat Nio) through 4.0.0 contains an unauthenticated path traversal vulnerability in the generation and article archive download endpoints via the hash query parameter. Attackers can supply ../ sequences in hash to download any readable .tar.gz or .zip file, including other users' generated archives.","published":"2026-10-16T18:17:41.000Z","lastModified":"2026-10-23T19:17:43.000Z","status":"Deferred","sourceIdentifier":"disclosure@vulncheck.com","cvss":{"version":"4.0","score":6.9,"severity":"MEDIUM","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-22"],"affected":[],"epss":{"score":0.0043,"percentile":0.37009,"date":"2026-10-26","history":[{"date":"2026-10-17","score":0.00353,"percentile":0.274}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.43%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-16T18:17:41.000Z","detail":{"score":"6.9","severity":"MEDIUM","publishedAt":"2026-10-16T18:17:41.393Z"},"summary":"New CVE, medium severity (CVSS 6.9)."}],"references":[{"url":"https://github.com/coaidev/coai/blob/v4.0.0/addition/article/api.go#L25-L35","source":"disclosure@vulncheck.com"},{"url":"https://github.com/coaidev/coai/blob/v4.0.0/addition/generation/api.go#L19-L29","source":"disclosure@vulncheck.com"},{"url":"https://hackmd.io/@hieuPenguinnn/coai-chatnio-generation-article-download-path-traversal","source":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/coai-through-4.0.0-unauthenticated-path-traversal-via-archive-download-endpoints","source":"disclosure@vulncheck.com"},{"url":"https://hackmd.io/@hieuPenguinnn/coai-chatnio-generation-article-download-path-traversal","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-111618","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."}