CVE-2026-56399

Received Received - Intake

BaseFortify

Publication date: 2026-06-30

Last updated on: 2026-06-30

Assigner: VulnCheck

Description

Open WebUI before 0.6.27 contains a server-side request forgery vulnerability in the /api/v1/retrieval/process/web endpoint that allows authenticated users to bypass SSRF protections. Attackers can manipulate URL parameters with location redirect headers to access internal services and potentially execute commands via instance secrets.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-06-30

Last Modified

2026-06-30

Generated

2026-07-01

AI Q&A

2026-07-01

EPSS Evaluated

N/A

NVD

CVE-2026-56399

EUVD

EUVD-2026-40451

Affected Vendors & Products

Vendor	Product	Version / Range
open_webui	open_webui	to 0.6.27 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-918	The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

Attack-Flow Graph

Executive Summary

This vulnerability exists in Open WebUI versions before 0.6.27 and is a server-side request forgery (SSRF) issue in the /api/v1/retrieval/process/web endpoint.

Authenticated users can bypass SSRF protections by manipulating URL parameters with location redirect headers.

This allows attackers to access internal services and potentially execute commands using instance secrets.

Impact Analysis

The vulnerability can allow an attacker with authentication to bypass SSRF protections and access internal services that are normally protected.

This could lead to unauthorized command execution via instance secrets, potentially compromising the affected system.

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