{"id":"CVE-2026-111707","title":"99AI through 4.3.0 IDOR via /api/chatLog/querySingleChat Chat Message Disclosure","summary":"99AI through 4.3.0 contains an insecure direct object reference vulnerability that allows unauthenticated attackers to read other users' chat messages because querySingleChat lacks an owner check. Attackers can send a fingerprint header …","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","cvssSource":"cna","cwe":["CWE-639"],"vendor":"vastxie","product":"99AI","affected":["99AI <= 4.3.0"],"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-16T18:19:32.858688Z"},"exploitAvailable":true,"published":"2026-10-16","updated":"2026-10-16","sourceUpdated":"2026-10-16T18:20:01.823Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-111707","references":[{"url":"https://hackmd.io/@hieuPenguinnn/99ai-chatlog-unauth-export-and-idor"},{"url":"https://github.com/vastxie/99AI/blob/v4.3.0/service/src/modules/chatLog/chatLog.service.ts#L463-L475"},{"url":"https://github.com/vastxie/99AI/blob/v4.3.0/service/src/common/auth/jwtAuth.guard.ts"},{"url":"https://github.com/vastxie/99AI"},{"url":"https://www.vulncheck.com/advisories/99ai-through-4.3.0-idor-via-api-chatlog-querysinglechat-chat-message-disclosure","label":"VulnCheck Advisory: 99AI through 4.3.0 IDOR via /api/chatLog/querySingleChat Chat Message Disclosure"}],"tags":["cve.org","exploit-available"],"ingestedAt":"2026-10-16T18:43:08.625Z","slug":"CVE-2026-111707","body":"## Overview\n\n99AI through 4.3.0 contains an insecure direct object reference vulnerability that allows unauthenticated attackers to read other users' chat messages because querySingleChat lacks an owner check. Attackers can send a fingerprint header to obtain a visitor JWT and iterate sequential chatId values to retrieve other users' message content and task data.\n\n## Affected\n\n- `99AI <= 4.3.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":29.2,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[]}