CVE-2026-90769: Server-Side Request Forgery (SSRF) in lfnovo open-notebook
Open Notebook before 1.11.0 fails to validate the URL parameter in POST /api/sources endpoint, allowing authenticated users to perform server-side requests to internal services. Attackers can supply arbitrary URLs to read cloud metadata, internal network services, and localhost-bound services through the application server's direct HTTP requests.
AI Analysis
Technical Summary
CVE-2026-90769 is an SSRF vulnerability in lfnovo open-notebook prior to version 1.11.0. The application fails to properly validate the URL parameter in the POST /api/sources endpoint, allowing authenticated users to supply arbitrary URLs. This enables the server to make HTTP requests to internal services, including cloud metadata endpoints and localhost-bound services, potentially exposing sensitive information.
Potential Impact
An attacker with authenticated access can leverage this vulnerability to make the server perform unauthorized HTTP requests to internal network services, cloud metadata endpoints, or localhost services. This can lead to information disclosure of sensitive internal resources. The CVSS 4.0 score is 8.3 (high severity), reflecting the potential impact of this SSRF vulnerability without requiring user interaction and with low attack complexity.
Mitigation Recommendations
Upgrade lfnovo open-notebook to version 1.11.0 or later, where the URL parameter validation issue in the POST /api/sources endpoint has been fixed. No other mitigation is indicated. Since this is not a cloud service, remediation depends on applying the official fix.
CVE-2026-90769: Server-Side Request Forgery (SSRF) in lfnovo open-notebook
Description
Open Notebook before 1.11.0 fails to validate the URL parameter in POST /api/sources endpoint, allowing authenticated users to perform server-side requests to internal services. Attackers can supply arbitrary URLs to read cloud metadata, internal network services, and localhost-bound services through the application server's direct HTTP requests.
CVSS v4.0
Score 8.3high
Affected software
lfnovo
open-notebook
pkg:github/lfnovo/open-notebookRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-90769 is an SSRF vulnerability in lfnovo open-notebook prior to version 1.11.0. The application fails to properly validate the URL parameter in the POST /api/sources endpoint, allowing authenticated users to supply arbitrary URLs. This enables the server to make HTTP requests to internal services, including cloud metadata endpoints and localhost-bound services, potentially exposing sensitive information.
Potential Impact
An attacker with authenticated access can leverage this vulnerability to make the server perform unauthorized HTTP requests to internal network services, cloud metadata endpoints, or localhost services. This can lead to information disclosure of sensitive internal resources. The CVSS 4.0 score is 8.3 (high severity), reflecting the potential impact of this SSRF vulnerability without requiring user interaction and with low attack complexity.
Mitigation Recommendations
Upgrade lfnovo open-notebook to version 1.11.0 or later, where the URL parameter validation issue in the POST /api/sources endpoint has been fixed. No other mitigation is indicated. Since this is not a cloud service, remediation depends on applying the official fix.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-13T10:14:52.461Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aa682ac55bf5e2cf583e18c
Added to database: 09/13/2026, 11:02:04 UTC
Last enriched: 09/13/2026, 11:16:52 UTC
Last updated: 09/14/2026, 02:28:40 UTC
Views: 18
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