CVE-2026-100373

Medium

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.

SeverityMedium

CVSS4.1

Exploit probability—

ProductOpenMetadata

PublishedSep 25, 2026

First seenSep 25, 2026

Weakness typeCWE-918Server-side request forgery (SSRF)

How to fix

Patches

github.com/open-metadata/OpenMetadata/commit/8f44482ac89bad9227df5b7f79beca2efe50c05f

Affected products

Product	Affected versions	Fixed in
open-metadata OpenMetadata	v ≤ 2.0.2	—

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