CVE-2026-100373

MEDIUMPre-NVD 4.14.1—
EchelonGraph scoreHIGH confidence

Score 4.1 from GitHub Security Advisory published 2026-09-25. A secondary CVSS source baseline 4.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
4.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 4.1Exploit: Elevated riskExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

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.

CVSS v3
4.1
EG Score
4.1MEDIUMhigh confidence
EG Risk
34
EG Risk 34/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity41% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.
EPSS PROB
0.3%
EPSS %ILE
16th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 25, 2026

Last Modified

September 25, 2026

Advisory Details (6)

Auto-updated Sep 25, 2026
🔬 Proof of concept available. Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

OpenMetadata through 2.0.2 SSRF via Webhook URL Validation Bypass | Advisories | VulnCheck

https://www.vulncheck.com/advisories/openmetadata-through-2.0.2-ssrf-via-webhook-url-validation-bypass
generic

GitHub - open-metadata/OpenMetadata: The Open Context Layer for Data and AI , OpenMetadata is the open platform for building trusted data context and business semantics for humans, AI assistants, and agents. · GitHub

https://github.com/open-metadata/OpenMetadata
generic

OpenMetadata/openmetadata-service/src/main/java/org/openmetadata/service/util/URLValidator.java at 2.0.2-release · open-metadata/OpenMetadata · GitHub

https://github.com/open-metadata/OpenMetadata/blob/2.0.2-release/openmetadata-service/src/main/java/org/openmetadata/service/util/URLValidator.java#L34-L47
github_commit

commit 8f44482ac89b (open-metadata/OpenMetadata)

Fix landed in open-metadata/OpenMetadata commit 8f44482ac89b — awaiting tagged release

https://github.com/open-metadata/OpenMetadata/commit/8f44482ac89bad9227df5b7f79beca2efe50c05f
generic

Outbound URL policy is enforced inconsistently across webhook paths · Issue #32592 · open-metadata/OpenMetadata · GitHub

https://github.com/open-metadata/OpenMetadata/issues/32592
generic🟡 PoC Available

Server-Side Request Forgery (SSRF) in OpenMetadata EventSubscription Webhooks · GitHub

https://gist.github.com/naif-alfardan/8a69e0648e11b07abe63f949346179c1

Vendor Advisories for CVE-2026-100373(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 18× in last 7d / 27× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-04 23:21 UTCEPSS rescore
  2. 2026-10-04 10:40 UTCEG score recompute
  3. 2026-10-04 10:40 UTCGHSA enrichment
  4. 2026-10-03 14:25 UTCEPSS rescore
  5. 2026-10-03 08:59 UTCEG score recompute
  6. 2026-10-03 08:59 UTCGHSA enrichment
  7. 2026-10-02 07:15 UTCEG score recompute
  8. 2026-10-02 07:15 UTCGHSA enrichment
  9. 2026-10-01 19:49 UTCEPSS rescore
  10. 2026-10-01 05:36 UTCEG score recompute
  11. 2026-10-01 05:36 UTCGHSA enrichment
  12. 2026-09-30 15:02 UTCEPSS rescore
  13. 2026-09-30 03:57 UTCEG score recompute
  14. 2026-09-30 03:57 UTCGHSA enrichment
  15. 2026-09-29 15:20 UTCEPSS rescore
  16. 2026-09-29 02:19 UTCEG score recompute
  17. 2026-09-29 02:18 UTCGHSA enrichment
  18. 2026-09-28 13:50 UTCEPSS rescore
  19. 2026-09-28 00:38 UTCEG score recompute
  20. 2026-09-28 00:38 UTCGHSA enrichment
  21. 2026-09-26 22:58 UTCEG score recompute
  22. 2026-09-26 22:58 UTCGHSA enrichment
  23. 2026-09-26 15:58 UTCEPSS rescore
  24. 2026-09-25 21:19 UTCEG score recompute
  25. 2026-09-25 20:37 UTCEG score recompute
Show 2 more
  1. 2026-09-25 19:46 UTCEG score recompute
  2. 2026-09-25 19:45 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-100373?
CVE-2026-100373 is a medium vulnerability published on September 25, 2026. 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…
When was CVE-2026-100373 disclosed?
CVE-2026-100373 was first published on September 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-100373 actively exploited?
CVE-2026-100373 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (16th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-100373?
CVE-2026-100373 has a CVSS base score of 4.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-100373?
An upstream fix for CVE-2026-100373 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-100373 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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