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TI-2026-42278 Aliases CVE-2026-59098GHSA-w676-mrp6-5fqq

LobeChat 2.2.9 - Cross-User Document Disclosure via Unscoped RAG Semantic Search

Priority MEDIUM 64CWE-639Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.

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-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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00415 36th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
lobehublobehubup to 2.2.9—No fix listedCNA
  • lobehub Vendorlobehub Affected up to 2.2.9 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-59098
  2. 2026-10-03 Alias added: GHSA-w676-mrp6-5fqq

References

Exploit 1

Patch 2

  • TI-2026-39067 LobeHub: Unauthenticated SSRF in `/webapi/proxy` CVSS 3.1CRITICAL 9.0
  • TI-2026-83681 Path traversal in LobeHub Chat lets users write arbitrary files CVSS 4.0HIGH 8.7
  • TI-2024-31448 Lobe Chat has insufficient fix for GHSA-mxhq-xw3g-rphc (CVE-2024-32964) CVSS 3.1CRITICAL 9.0
  • TI-2024-21831 lobe-chat `/api/proxy` endpoint Server-Side Request Forgery vulnerability CVSS 3.1CRITICAL 9.0
  • TI-2026-58746 LobeChat 2.2.1 Webhook Signature Verification Bypass QQ Feishu CVSS 4.0MEDIUM 6.9
  • TI-2024-21832 ssrf vulnerability in lobe-chat CVSS 3.1HIGH 8.6
See all 21 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences