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
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
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)
- www.vulncheck.com/advisories/openmetadata-through-2.0.2-ssrf-via-webhook-url-va… (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.