CVE-2026-39411 MEDIUM

CVE-2026-39411: LobeHub has an unauthenticated authentication bypass on `webapi` routes via forgeable `X-lobe-chat-auth` header

Vendor Lobehub
Product lobehub
Weakness CWE-287 · Improper authentication
Published April 8, 2026
Last update April 8, 2026

CVSS base score

5.0/10
Attack vector Network
Attack complexity High
Privileges required Low
User interaction None
Confidentiality Low
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

LobeHub is a work-and-lifestyle space to find, build, and collaborate with agent teammates that grow with you. Prior to 2.1.48, the webapi authentication layer trusts a client-controlled X-lobe-chat-auth header that is only XOR-obfuscated, not signed or otherwise authenticated. Because the XOR key is hardcoded in the repository, an attacker can forge arbitrary auth payloads and bypass authentication on protected webapi routes. Affected routes include /webapi/chat/[provider], /webapi/models/[provider], /webapi/models/[provider]/pull, and /webapi/create-image/comfyui. This vulnerability is fixed in 2.1.48.

Key dates

02Disclosure timeline

April 8, 2026 CVE published
April 8, 2026 Record updated