CVE-2026-90769 Open Notebook before 1.11.0 Server-Side Request Forgery via link-source
Authenticated attackers can exploit Open Notebook to perform server-side requests, accessing internal services and cloud metadata.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-90769?
CVE-2026-90769 is a high-severity server-side request forgery vulnerability in lfnovo open-notebook, published on 13 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-918
Which versions are affected by CVE-2026-90769?
How do I fix CVE-2026-90769?
No fix has been published for CVE-2026-90769 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-90769 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-90769 exists.
Sources
Also known as GHSA-wr7p-6rrg-8m28.