CVE-2026-90769

HIGH 7.7

Open Notebook before 1.11.0 Server-Side Request Forgery via link-source

CVSS Score

7.7

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-918
Vendor	lfnovo
Product	open-notebook
Published	Sep 13, 2026
Last Updated	Sep 14, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

Affected Versions

lfnovo / open-notebook

0 < 1.11.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/lfnovo/open-notebook/issues/1284 github.com: https://github.com/lfnovo/open-notebook github.com: https://github.com/lfnovo/open-notebook/blob/8889087e317177d7b6e286342ab34e0c9c01d43e/api/routers/sources.py github.com: https://github.com/lfnovo/open-notebook/commit/9045ea50196927eac7de647bb5b7009349236fb4 vulncheck.com: https://www.vulncheck.com/advisories/open-notebook-before-1.11.0-server-side-request-forgery-via-link-source

Credits

🔍 George Chen