SSRF in Lfnovo Open-Notebook
CVE-2026-90769
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.
Affected products
Weakness classification (CWE)
References
- disclosure@vulncheck.com (issue-tracking)
- disclosure@vulncheck.com (product)
- disclosure@vulncheck.com (technical-description)
- disclosure@vulncheck.com (patch)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-90769?
- CVE-2026-90769 is a high-severity vulnerability in Lfnovo Open-Notebook, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.7/10. Published 2026-09-13.
- How severe is CVE-2026-90769?
- High severity. CVSS v3 base score is 7.7 out of 10.