{"id":"CVE-2026-111618","summary":"CoAI through 4.0.0 Unauthenticated Path Traversal via Archive Download Endpoints","details":"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.","modified":"2026-10-21T02:55:50.026473521Z","published":"2026-10-16T17:38:55.985Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-22"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111618.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111618.json"},{"type":"PACKAGE","url":"https://github.com/coaidev/coai"},{"type":"ARTICLE","url":"https://github.com/coaidev/coai/blob/v4.0.0/addition/article/api.go#L25-L35"},{"type":"ARTICLE","url":"https://github.com/coaidev/coai/blob/v4.0.0/addition/generation/api.go#L19-L29"},{"type":"ADVISORY","url":"https://hackmd.io/@hieuPenguinnn/coai-chatnio-generation-article-download-path-traversal"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111618"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/coai-through-4.0.0-unauthenticated-path-traversal-via-archive-download-endpoints"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/coaidev/coai","events":[{"introduced":"0"},{"last_affected":"e7df3f687b0a466eb396cd4f04686a3246b898c2"}],"database_specific":{"extracted_events":[{"strategy":"StandardRange","range":[{"introduced":"0"},{"last_affected":"4.0.0"}],"source":"AFFECTED_FIELD"}]}}],"versions":["v4.0.0","v3.11.1","v3.10","v3.9","v3.8","v3.7","v3.6","v3.5","v3.4","v3.3","v3.2","v3.1","v3.0","v2.1","v2.0","2.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-111618.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}