What’s Vulnerable › Vulnerabilities

CVE-2026-59098: LobeChat 2.2.9 - Cross-User Document Disclosure via Unscoped RAG Semantic Search

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-02 · updated 2026-10-25
• Weakness: CWE-639

Description

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.

Affected products

• lobehub: through 2.2.9

References

• https://github.com/lobehub/lobehub/commit/4a7931a4e66832947dba11afdffae2918a56b6a0
• https://github.com/lobehub/lobehub/issues/16535
• https://github.com/lobehub/lobehub/pull/16594
• https://www.vulncheck.com/advisories/lobechat-cross-user-document-disclosure-via-unscoped-rag-semantic-search

Get alerted when CVE-2026-59098 or the next vulnerability affects your stack