CVE-2026-90769
Severity CVSS v4.0:
HIGH
Type:
CWE-918
Server-Side Request Forgery (SSRF)
Publication date:
13/09/2026
Last modified:
24/09/2026
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.
Impact
Base Score 4.0
8.30
Severity 4.0
HIGH
Base Score 3.x
7.70
Severity 3.x
HIGH
References to Advisories, Solutions, and Tools
- https://github.com/lfnovo/open-notebook
- https://github.com/lfnovo/open-notebook/blob/8889087e317177d7b6e286342ab34e0c9c01d43e/api/routers/sources.py
- https://github.com/lfnovo/open-notebook/commit/9045ea50196927eac7de647bb5b7009349236fb4
- https://github.com/lfnovo/open-notebook/issues/1284
- https://www.vulncheck.com/advisories/open-notebook-before-1.11.0-server-side-request-forgery-via-link-source
- https://github.com/lfnovo/open-notebook/issues/1284