Vulnerability · Published Jul 2, 2026 · Assigned by VulnCheck

CVE-2026-59100LobeChat 2.2.9 - Broken Object Level Authorization via Chat-Group Agent Operations

Medium 5.0

In plain English

A medium-severity authorization bypass via user-controlled key in lobehub from lobehub. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).

Severity (CVSS 3.1)5.0Medium

Exploit odds (30 days)0.3%top 78.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

LobeChat through 2.2.9 contains a broken object level authorization vulnerability that allows authenticated attackers to access and modify other users' chat-group agent data by supplying arbitrary group identifiers. Attackers can invoke the getGroupAgents, updateAgentInGroup, and removeAgentsFromGroup operations without user-scoped predicates to read agent listings, modify agent roles and ordering, and remove agents from chat groups belonging to other users.

Affected products (as reported)

Vendor	Product	Versions
lobehub	lobehub	0 – through 2.2.9

Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

References

Researcher Disclosure technical-description, exploit
Fix PR issue-tracking
Fix Commit patch
https://www.vulncheck.com/advisories/lobechat-broken-object-level-authorization-via-chat-group-agent-operations third-party-advisory