PT-2026-55298 · Lobe Chat · Lobe Chat

George Chen · Published 2026-07-02 · Updated 2026-07-02 · CVE-2026-59098

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions LobeChat versions prior to 2.3.0

Description Broken access control exists in the retrieval-augmented-generation (RAG) semantic search functionality. Authenticated attackers can access data from other users due to missing user-identifier predicates in the semanticSearch method of the chunk model. By providing arbitrary victim file or knowledge-base identifiers through the chunk retrieval and chat knowledge-base paths, an attacker can retrieve metadata, file names, and text content belonging to other users.

Recommendations Update LobeChat to version 2.3.0 or later.

Exploit

Fix

IDOR

Weakness Enumeration

CWE-639

Related Identifiers

CVE-2026-59098

Affected Products

Lobe Chat

References · 7

• 🔥 https://github.com/lobehub/lobehub/issues/16535 · Exploit
• https://github.com/lobehub/lobehub/commit/4a7931a4e66832947dba11afdffae2918a56b6a0 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-59098 · Security Note
• https://github.com/lobehub/lobehub/pull/16594 · Note
• https://twitter.com/infoflowcloud/status/2072815508701741276 · Twitter Post
• https://twitter.com/CVEnew/status/2072814586886304246 · Twitter Post
• https://vulncheck.com/advisories/lobechat-cross-user-document-disclosure-via-unscoped-rag-semantic-search · Note