CVE-2026-33340

CRITICAL NUCLEI

LoLLMs WEBUI has unauthenticated Server-Side Request Forgery (SSRF) in /api/proxy endpoint

Title source: cna

Exploitation Summary

EIP tracks 1 public exploit for CVE-2026-33340. PoCs published by regaan. A Nuclei detection template is also available.

AI-analyzed exploit summary This repository provides a detailed technical analysis of CVE-2026-33340, an SSRF vulnerability in lollms-webui. It includes root cause analysis, vulnerable code snippets, proof-of-concept steps, and remediation guidance.

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.

Exploits (1)

nomisec WRITEUP

by regaan · poc

https://github.com/regaan/CVE-2026-33340

View Code ZIP pw:eip

This repository provides a detailed technical analysis of CVE-2026-33340, an SSRF vulnerability in lollms-webui. It includes root cause analysis, vulnerable code snippets, proof-of-concept steps, and remediation guidance.

Classification

Writeup 100%

Attack Type

Ssrf

Complexity

Trivial

Reliability

Reliable

Target: ParisNeo/lollms-webui (all versions)

No auth needed

Prerequisites: Access to the vulnerable endpoint /api/proxy

MITRE ATT&CK

T1190 - Exploit Public-Facing Application T1210 - Exploitation of Remote Services

devstral-2 · analyzed Apr 09, 2026 Full analysis →

Nuclei Templates (1)

LoLLMs WEBUI - Server-Side Request Forgery

CRITICALVERIFIEDby theamanrawat

References (2)

Core 2

Core References

X_Refsource_Confirm x_refsource_confirm

https://github.com/ParisNeo/lollms-webui/security/advisories/GHSA-mcwr-5469-pxj4

X_Refsource_Misc x_refsource_misc

https://github.com/ParisNeo/lollms-webui/blob/8c5dcef63d847bb3d027ec74915d8fe4afd3014e/lollms/server/endpoints/lollms_apps.py#L443-L450

View Writeup ZIP pw:eip

Scores

CVSS v3 9.1

EPSS 0.1463

EPSS Percentile 94.7%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact total

Details

CWE

CWE-306 CWE-918

Status published

Products (2)

lollms/lollms_web_ui

ParisNeo/lollms-webui <= 8c5dcef63d847bb3d027ec74915d8fe4afd3014e

Published Mar 24, 2026

Tracked Since Mar 24, 2026