CVE-2026-91750
Received Received - Intake

WeKnora SSRF Bypass via Redirect in Knowledge Base URL

Publication date: 2026-09-15

Last updated on: 2026-09-15

Assigner: VulnCheck

Description
WeKnora before 0.7.0 fails to re-validate HTTP redirect targets in the POST /api/v1/knowledge-bases/:id/knowledge/url endpoint when downloading documents from user-supplied URLs. Authenticated attackers can bypass initial SSRF validation by supplying a public URL that redirects to internal network addresses, allowing access to internal services and cloud metadata.

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Meta Information

Published
2026-09-15
Last Modified
2026-09-15
Generated
2026-09-15
AI Q&A
2026-09-15
EPSS Evaluated
N/A
NVD
CVE-2026-91750
EUVD
EUVD-2026-78232

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
tencent weknora to 0.7.0 (exc)
tencent weknora 0.6.2

Helpful Resources

Exploitability

CWE
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KEV
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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

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Executive Summary

This is a Server-Side Request Forgery (SSRF) vulnerability in WeKnora versions before 0.7.0. The issue occurs in the POST /api/v1/knowledge-bases/:id/knowledge/url endpoint, where the application fails to re-validate HTTP redirect targets when downloading documents from user-supplied URLs. Authenticated attackers can bypass initial SSRF protections by providing a public URL that redirects to internal network addresses, potentially exposing internal services and cloud metadata.

Detection Guidance

To detect this vulnerability, monitor network traffic for outbound requests from WeKnora to internal or restricted IP addresses. Check logs for POST requests to /api/v1/knowledge-bases/:id/knowledge/url with URLs redirecting to internal addresses. Verify if WeKnora versions before 0.7.0 are running.

Impact Analysis

An attacker could exploit this to access internal services, cloud metadata, or restricted network resources that should not be publicly accessible. This could lead to data breaches, unauthorized access to sensitive systems, or exposure of confidential information. The impact is limited to authenticated users due to the requirement for initial access.

Compliance Impact

This vulnerability could lead to non-compliance with GDPR, HIPAA, or other regulations requiring protection of sensitive data. Unauthorized access to internal systems or cloud metadata may result in data breaches, violating confidentiality requirements and potentially leading to legal penalties or loss of trust.

Mitigation Strategies

Upgrade WeKnora to version 0.7.0 or later immediately. Implement strict SSRF validation for all outbound requests. Block internal IP ranges in firewall rules. Review and restrict access to the /api/v1/knowledge-bases/:id/knowledge/url endpoint.

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