{"id":"CVE-2026-59098","summary":"LobeChat 2.2.9 - Cross-User Document Disclosure via Unscoped RAG Semantic Search","details":"LobeChat through 2.2.9 contains a broken access control vulnerability in the retrieval-augmented-generation semantic search functionality that allows authenticated attackers to access other users' data by exploiting missing user-identifier predicates in the chunk model semanticSearch method. Attackers can supply arbitrary victim file or knowledge-base identifiers through the chunk retrieval and chat knowledge-base paths to retrieve text content, file names, and metadata belonging to other users.","modified":"2026-09-17T11:45:21.735742841Z","published":"2026-07-02T19:42:27.458Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-639"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59098.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59098.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59098"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/lobechat-cross-user-document-disclosure-via-unscoped-rag-semantic-search"},{"type":"REPORT","url":"https://github.com/lobehub/lobehub/pull/16594"},{"type":"FIX","url":"https://github.com/lobehub/lobehub/commit/4a7931a4e66832947dba11afdffae2918a56b6a0"},{"type":"PACKAGE","url":"https://github.com/lobehub/lobehub"},{"type":"EVIDENCE","url":"https://github.com/lobehub/lobehub/issues/16535"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/lobehub/lobehub","events":[{"introduced":"0"},{"last_affected":"588c0692df6aa58237615411f9b34cbd5a84e714"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"2.2.9"}],"source":"AFFECTED_FIELD"}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-59098.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"}]}