CVE-2026-100373: SSRF (CVSS 4.1)

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.

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CVSS v3.1 Score

4.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N

EPSS — Exploit Prediction

0.0026

Probability of exploitation

0.17%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-918 Server-Side Request Forgery (SSRF)

References

Other References

https://gist.github.com/naif-alfardan/8a69e0648e11b07abe63f949346179c1 https://github.com/open-metadata/OpenMetadata 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/commit/8f44482ac89bad9227df5b7f79beca2efe50c05f https://github.com/open-metadata/OpenMetadata/issues/32592 https://www.vulncheck.com/advisories/openmetadata-through-2.0.2-ssrf-via-webhook-url-validation-bypass

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 4.1 (MEDIUM).

How severe is CVE-2026-100373? +

CVE-2026-100373 has a CVSS v3.1 score of 4.1 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0026, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-100373? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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