CVE-2026-18251

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory published 2026-09-14. a secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to obtain sensitive information due to improper validation of the WebSocket origin.

CVSS v3
4.3
EG Score
4.3(high)
EG Risk
19(Track)
EG Risk 19/100SSVC: Track

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
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
4%
KEV
Not listed

Published

September 14, 2026

Last Modified

September 16, 2026

Advisory Details (1)

Auto-updated Sep 14, 2026
Patch available.
generic Patch Available

Security Bulletin: IBM i is Affected By Multiple Vulnerabilities in Navigator for i and Digital Certificate Manager for i.

https://www.ibm.com/support/pages/node/7286974

Vendor Advisories for CVE-2026-18251(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 15× in last 7d / 15× 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. 2026-09-18 21:15 UTCEG score recompute
  2. 2026-09-18 21:15 UTCGHSA enrichment
  3. 2026-09-18 19:27 UTCEPSS rescore
  4. 2026-09-17 20:12 UTCEG score recompute
  5. 2026-09-17 20:12 UTCGHSA enrichment
  6. 2026-09-16 19:36 UTCEG score recompute
  7. 2026-09-16 19:36 UTCGHSA enrichment
  8. 2026-09-16 14:07 UTCEPSS rescore
  9. 2026-09-16 05:14 UTCEPSS rescore
  10. 2026-09-15 20:56 UTCEG score recompute
  11. 2026-09-15 20:56 UTCGHSA enrichment
  12. 2026-09-14 20:22 UTCEG score recompute
  13. 2026-09-14 20:15 UTCEG score recompute
  14. 2026-09-14 19:39 UTCEG score recompute
  15. 2026-09-14 19:39 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-18251?
CVE-2026-18251 is a medium vulnerability published on September 14, 2026. IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to obtain sensitive information due to improper validation of the WebSocket origin.
When was CVE-2026-18251 disclosed?
CVE-2026-18251 was first published in the National Vulnerability Database on September 14, 2026, with the most recent update on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18251 actively exploited?
CVE-2026-18251 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 96.3% of all scored CVEs.
What is the CVSS score of CVE-2026-18251?
CVE-2026-18251 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-18251?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-18251, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-18251

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