{"id":"CVE-2026-59098","title":"LobeChat 2.2.9 - Cross-User Document Disclosure via Unscoped RAG Semantic Search","summary":"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-identifi…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","cvssSource":"cna","cwe":["CWE-639"],"vendor":"lobehub","product":"lobehub","affected":["lobehub <= 2.2.9"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-07-06T16:36:44.585430Z"},"exploitAvailable":true,"published":"2026-07-02","updated":"2026-11-08","sourceUpdated":"2026-11-08T14:07:19.592Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-59098","references":[{"url":"https://github.com/lobehub/lobehub/issues/16535","label":"Researcher Disclosure"},{"url":"https://github.com/lobehub/lobehub/pull/16594","label":"Fix PR"},{"url":"https://github.com/lobehub/lobehub/commit/4a7931a4e66832947dba11afdffae2918a56b6a0","label":"Fix Commit"},{"url":"https://www.vulncheck.com/advisories/lobechat-cross-user-document-disclosure-via-unscoped-rag-semantic-search"}],"tags":["cve.org","exploit-available"],"epss":0.00415,"epssPercentile":0.36091,"ingestedAt":"2026-11-08T14:51:22.285Z","slug":"CVE-2026-59098","body":"## Overview\n\nLobeChat 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.\n\n## Affected\n\n- `lobehub <= 2.2.9`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[]}