SSRF in Open-Metadata Openmetadata
CVE-2026-100373
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (18.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 18.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
Weakness classification (CWE)
References
- gist.github.com/naif-alfardan/8a69e0648e11b07abe63f949346179c1 (exploit, third-party-advisory)
- github.com/open-metadata/OpenMetadata/issues/32592 (issue-tracking)
- github.com/open-metadata/OpenMetadata/commit/8f44482ac89bad9227df5b7f79beca2efe… (patch)
- github.com/open-metadata/OpenMetadata/blob/2.0.2-release/openmetadata-service/s… (technical-description)
- github.com/open-metadata/OpenMetadata (product)
- VulnCheck Advisory: OpenMetadata through 2.0.2 SSRF via Webhook URL Validation Bypass (third-party-advisory)
Frequently asked questions
- What is CVE-2026-100373?
- CVE-2026-100373 is a medium-severity vulnerability in Open-Metadata Openmetadata, classified under Server-Side Request Forgery (SSRF). CVSS score: 4.1/10. Published 2026-09-25.
- How severe is CVE-2026-100373?
- Medium severity. CVSS v3 base score is 4.1 out of 10.