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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.

PUBLISHED Reserved 2026-07-02 | Published 2026-07-02 | Updated 2026-07-06 | Assigner VulnCheck




MEDIUM: 5.0CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

LOW: 2.3CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

Problem types

Authorization Bypass Through User-Controlled Key

Product status

Default status
unaffected

Any version
affected

Credits

George Chen finder

References

github.com/lobehub/lobehub/issues/16537 (Researcher Disclosure) technical-description exploit

github.com/lobehub/lobehub/pull/16586 (Fix PR) issue-tracking

github.com/...ommit/9ed5a7e20d8a67c431265f5a252e9559d9920907 (Fix Commit) patch

www.vulncheck.com/...ization-via-chat-group-agent-operations third-party-advisory

cve.org (CVE-2026-59100)

nvd.nist.gov (CVE-2026-59100)

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