Lobe Chat is an open-source artificial intelligence chat framework. Prior to version 1.130.1, the project's OIDC redirect handling logic constructs the host and protocol of the final redirect URL based on the X-Forwarded-Host or Host headers and the X-Forwarded-Proto value. In deployments where a reverse proxy forwards client-supplied X-Forwarded-* headers to the origin as-is, or where the origin trusts them without validation, an attacker can inject an arbitrary host and trigger an open redirect that sends users to a malicious domain. This issue has been patched in version 1.130.1.
Affected: npm: @lobehub/chat
### **Description**
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> Vulnerability Overview >
The project's OIDC redirect handling logic constructs the host and protocol of the final redirect URL based on the X-Forwarded-Host or Host headers and the X-Forwarded-Proto value. In deployments where a reverse proxy forwards client-supplied X-Forwarded-* headers to the origin as-is, or where the origin trusts them without validation, an attacker can inject an arbitrary host and trigger an open redirect that sends users to a malicious domain.
> Vulnerable Code Analysis >
```bash const internalRedirectUrlString = await oidcService.getInteractionResult(uid, result); log('OIDC Provider internal redirect URL string: %s', internalRedirectUrlString);
let finalRedirectUrl; try { finalRedirectUrl = correctOIDCUrl(request, new URL(internalRedirectUrlString)); } catch { finalRedirectUrl = new URL(internalRedirectUrlString); log('Warning: Could not parse redirect URL, using as-is: %s', internalRedirectUrlString); }
return NextResponse.redirect(finalRedirectUrl, { headers: request.headers, status: 303, }); ```
https://github.com/lobehub/lobe-chat/blob/aa841a3879c30142720485182ad62aa0dbd74edc/src/app/(backend)/oidc/consent/route.ts#L113-L127
### PoC
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> curl Example >
```bash curl -i 'http://localhost:3210/oidc/callback/desktop?code=abc&state=test123' \ -H 'X-Forwarded-Host: google.com' \ -H 'X-Forwarded-Proto: https' ```
<img width="1504" height="304" alt="image" src="https://github.com/user-attachments/…