Vulnerability · Published Jul 2, 2026 · Assigned by VulnCheck

CVE-2026-58580LobeChat 2.2.9 - Broken Object-Level Authorization in Message Sub-Resource Writes

Medium 5.9

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 0.2% (higher than 16% of all known vulnerabilities).

Severity (CVSS 3.1)5.9Medium

Exploit odds (30 days)0.2%top 83.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

LobeChat through 2.2.9 server-database deployments are vulnerable to broken object-level authorization in MessageModel. The updateMessagePlugin, updatePluginState, updatePluginError, updateTTS and updateTranslate methods filter target rows by message id alone, omitting the userId scope that sibling methods apply, and findMessagePlugin reads back by id alone. Reachable via the corresponding tRPC message procedures, an authenticated user who knows another user's message identifier can overwrite that victim's plugin tool-call metadata, plugin state/error, text-to-speech and translation records on the same instance, and the tampered content is served back to the victim. Exploitation requires knowledge of the victim's non-enumerable message identifier.

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:H/A:N

References

Researcher Disclosure issue-tracking
https://www.vulncheck.com/advisories/lobechat-broken-object-level-authorization-in-message-sub-resource-writes third-party-advisory