CVE-2026-16187

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory published 2026-09-14. A secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 6.5Exploit: None knownExposed services: Not assessed

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

IBM WebSphere Application Server 9.0, and 8.5 could allow a remote attacker to bypass authentication and obtain sensitive information by sending a crafted unauthenticated request.

CVSS v3
6.5
EG Score
6.5MEDIUMhigh 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
Severity65% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.3%
EPSS %ILE
14th
KEV
Not listed

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

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). 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 14, 2026

Last Modified

September 16, 2026

Advisory Details (1)

Auto-updated Sep 14, 2026
No patch confirmed yet.
generic

Security Bulletin: IBM WebSphere Application Server prior to 9.0.5.29 and 8.5.5.31 are affected by multiple vulnerabilities

https://www.ibm.com/support/pages/node/7286610

Vendor Advisories for CVE-2026-16187(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 19× in last 7d / 54× 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 22:22 UTCGHSA enrichment
  3. 2026-10-03 23:34 UTCEG score recompute
  4. 2026-10-03 23:34 UTCGHSA enrichment
  5. 2026-10-03 14:25 UTCEPSS rescore
  6. 2026-10-03 00:41 UTCEG score recompute
  7. 2026-10-03 00:41 UTCGHSA enrichment
  8. 2026-10-02 01:53 UTCEG score recompute
  9. 2026-10-02 01:53 UTCGHSA enrichment
  10. 2026-10-01 19:49 UTCEPSS rescore
  11. 2026-10-01 03:01 UTCEG score recompute
  12. 2026-10-01 03:01 UTCGHSA enrichment
  13. 2026-09-30 15:02 UTCEPSS rescore
  14. 2026-09-30 04:13 UTCEG score recompute
  15. 2026-09-30 04:13 UTCGHSA enrichment
  16. 2026-09-29 15:20 UTCEPSS rescore
  17. 2026-09-29 05:25 UTCEG score recompute
  18. 2026-09-29 05:25 UTCGHSA enrichment
  19. 2026-09-28 13:51 UTCEPSS rescore
  20. 2026-09-28 06:37 UTCEG score recompute
  21. 2026-09-28 06:37 UTCGHSA enrichment
  22. 2026-09-27 13:47 UTCEPSS rescore
  23. 2026-09-27 07:50 UTCEG score recompute
  24. 2026-09-27 07:50 UTCGHSA enrichment
  25. 2026-09-26 15:58 UTCEPSS rescore
Show 29 more
  1. 2026-09-26 09:02 UTCEG score recompute
  2. 2026-09-26 09:01 UTCGHSA enrichment
  3. 2026-09-25 10:10 UTCEG score recompute
  4. 2026-09-25 10:10 UTCGHSA enrichment
  5. 2026-09-24 11:22 UTCEG score recompute
  6. 2026-09-24 11:22 UTCGHSA enrichment
  7. 2026-09-23 12:35 UTCEG score recompute
  8. 2026-09-23 12:35 UTCGHSA enrichment
  9. 2026-09-22 13:46 UTCEG score recompute
  10. 2026-09-22 13:46 UTCGHSA enrichment
  11. 2026-09-21 14:58 UTCEG score recompute
  12. 2026-09-21 14:58 UTCGHSA enrichment
  13. 2026-09-20 15:57 UTCGHSA enrichment
  14. 2026-09-19 17:08 UTCEG score recompute
  15. 2026-09-19 17:08 UTCGHSA enrichment
  16. 2026-09-18 19:27 UTCEPSS rescore
  17. 2026-09-18 18:20 UTCGHSA enrichment
  18. 2026-09-17 19:32 UTCEG score recompute
  19. 2026-09-17 19:32 UTCGHSA enrichment
  20. 2026-09-16 19:36 UTCEG score recompute
  21. 2026-09-16 19:36 UTCGHSA enrichment
  22. 2026-09-16 14:07 UTCEPSS rescore
  23. 2026-09-16 05:14 UTCEPSS rescore
  24. 2026-09-15 20:47 UTCGHSA enrichment
  25. 2026-09-14 21:33 UTCEG score recompute
  26. 2026-09-14 21:33 UTCGHSA enrichment
  27. 2026-09-14 20:21 UTCEG score recompute
  28. 2026-09-14 20:00 UTCEG score recompute
  29. 2026-09-14 19:59 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-16187?
CVE-2026-16187 is a medium vulnerability published on September 14, 2026. IBM WebSphere Application Server 9.0, and 8.5 could allow a remote attacker to bypass authentication and obtain sensitive information by sending a crafted unauthenticated request.
When was CVE-2026-16187 disclosed?
CVE-2026-16187 was first published 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-2026-16187 actively exploited?
CVE-2026-16187 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (14th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-16187?
CVE-2026-16187 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-16187?
No fix for CVE-2026-16187 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-16187 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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