Auth bypass in Lobehub
CVE-2026-59100
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.
Vulnerability class: IDOR (Insecure Direct Object Reference)
EPSS: 0.002 (7.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Lobehub — versions 0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (patch)
- disclosure@vulncheck.com (technical-description, exploit)
- disclosure@vulncheck.com (issue-tracking)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-59100?
- CVE-2026-59100 is a medium-severity vulnerability in Lobehub, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.0/10. Published 2026-07-02.
- How severe is CVE-2026-59100?
- Medium severity. CVSS v3 base score is 5.0 out of 10.