CVE-2026-33340 LoLLMs WEBUI has unauthenticated Server-Side Request Forgery (SSRF) in /api/proxy endpoint
Unauthenticated attackers can exploit an SSRF vulnerability in the proxy endpoint to access internal services and exfiltrate sensitive cloud metadata.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-33340?
CVE-2026-33340 is a critical server-side request forgery vulnerability in ParisNeo lollms-webui, published on 24 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
LoLLMs WEBUI provides the Web user interface for Lord of Large Language and Multi modal Systems. A critical Server-Side Request Forgery (SSRF) vulnerability has been identified in all known existing versions of `lollms-webui`. The `@router.post("/api/proxy")` endpoint allows unauthenticated attackers to force the server into making arbitrary GET requests. This can be exploited to access internal services, scan local networks, or exfiltrate sensitive cloud metadata (e.g., AWS/GCP IAM tokens). As of time of publication, no known patched versions are available.
Which versions are affected by CVE-2026-33340?
It affects 1 product.
Products include Lollms Lollms Web Ui.
How do I fix CVE-2026-33340?
No fix has been published for CVE-2026-33340 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-33340 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-33340 exists.
Public exploit code: 1 Nuclei template and 1 proofs of concept on GitHub.
Other vulnerabilities in ParisNeo lollms-webui
- CVE-2024-2359 Improper Neutralization of Special Elements used in an OS Command in parisneo/lollms-webui
- CVE-2024-2360 Path Traversal leading to Remote Code Execution in parisneo/lollms-webui
- CVE-2024-4320 Remote Code Execution due to LFI in '/install_extension' in parisneo/lollms-webui
- CVE-2024-2358 Path Traversal leading to Remote Code Execution in parisneo/lollms-webui
- CVE-2024-4326 Remote Code Execution via `/apply_settings` and `/execute_code` in parisneo/lollms-webui
Sources
Also known as GHSA-mcwr-5469-pxj4.