CVE-2026-54157 PoC — LobeHub: Unauthenticated SSRF in `/webapi/proxy`

Source

https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-54157.yaml

Associated Vulnerability

Title: LobeHub: Unauthenticated SSRF in `/webapi/proxy` (CVE-2026-54157)
Description:LobeHub is a work-and-lifestyle space to find, build, and collaborate with agent teammates that grow with you. Prior to 2.1.57, the /webapi/proxy endpoint on app.lobehub.com accepts a URL in the POST body and fetches it server-side without any authentication. An attacker can use this to make arbitrary outbound requests from LobeHub's infrastructure, leak Vercel deployment details, and inject cookies on the lobehub.com domain through reflected Set-Cookie headers. This vulnerability is fixed in 2.1.57.

Description

LobeHub LobeChat versions up to and including 2.1.56 are vulnerable to an unauthenticated server-side request forgery vulnerability in the /webapi/proxy endpoint. The endpoint accepts a URL in the POST request body and fetches it server-side without authentication.

File Snapshot

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