CVE-2026-100373 OpenMetadata through 2.0.2 SSRF via Webhook URL Validation Bypass
Attackers with EventSubscription permissions can exploit SSRF to access internal networks and cloud metadata endpoints via webhook URL validation bypass.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-100373?
CVE-2026-100373 is a medium-severity server-side request forgery vulnerability in open-metadata OpenMetadata, published on 25 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
OpenMetadata through 2.0.2 contains a server-side request forgery vulnerability in the URLValidator.validateURL function that fails to properly resolve DNS hostnames and validate internal addresses. Users permitted to create or update EventSubscription can set webhook destinations to internal hosts, allowing the server to send requests to private networks and cloud metadata endpoints while returning HTTP status codes that enable blind SSRF probing.
Weakness: CWE-918
Which versions are affected by CVE-2026-100373?
How do I fix CVE-2026-100373?
No fix has been published for CVE-2026-100373 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-2026-100373 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100373 exists.
Sources
Also known as GHSA-2qh3-cv3f-wh5h.