CVE-2026-84666

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreHIGH confidence

Score 5.4 from GitHub Security Advisory published 2026-09-02. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.4Exploit: None knownExposed: 0

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

Jenkins Job Configuration History Plugin 1367.vc8fa_b_15101dc and earlier allows overwriting the plugin's history recording configuration through Stapler data binding, allowing attackers to redirect history storage to an attacker-specified directory and modify history recording settings.

CVSS v3
5.4
EG Score
5.4(high)
EG Risk
24(Track)
EG Risk 24/100SSVC: 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
Severity54% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
1%
KEV
Not listed

Published

September 2, 2026

Last Modified

September 4, 2026

Advisory Details (1)

Auto-updated Sep 4, 2026
No patch confirmed yet.
generic

Jenkins Security Advisory 2026-09-02

https://www.jenkins.io/security/advisory/2026-09-02/#SECURITY-4098

Vendor Advisories for CVE-2026-84666(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 46× 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. 2026-09-19 10:59 UTCEG score recompute
  2. 2026-09-19 10:59 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 12:15 UTCEG score recompute
  5. 2026-09-18 12:15 UTCGHSA enrichment
  6. 2026-09-17 19:32 UTCEPSS rescore
  7. 2026-09-17 13:31 UTCGHSA enrichment
  8. 2026-09-16 14:39 UTCEG score recompute
  9. 2026-09-16 14:39 UTCGHSA enrichment
  10. 2026-09-16 14:09 UTCEPSS rescore
  11. 2026-09-16 05:15 UTCEPSS rescore
  12. 2026-09-15 15:55 UTCEG score recompute
  13. 2026-09-15 15:55 UTCGHSA enrichment
  14. 2026-09-15 03:12 UTCEPSS rescore
  15. 2026-09-15 03:12 UTCEPSS rescore
  16. 2026-09-14 17:11 UTCGHSA enrichment
  17. 2026-09-13 18:27 UTCEG score recompute
  18. 2026-09-13 18:27 UTCGHSA enrichment
  19. 2026-09-12 19:43 UTCGHSA enrichment
  20. 2026-09-11 20:59 UTCEG score recompute
  21. 2026-09-11 20:59 UTCGHSA enrichment
  22. 2026-09-11 14:53 UTCEPSS rescore
  23. 2026-09-11 14:53 UTCEPSS rescore
  24. 2026-09-10 22:15 UTCEG score recompute
  25. 2026-09-10 22:15 UTCGHSA enrichment
Show 21 more
  1. 2026-09-09 23:31 UTCGHSA enrichment
  2. 2026-09-08 23:12 UTCEG score recompute
  3. 2026-09-08 23:12 UTCGHSA enrichment
  4. 2026-09-08 22:01 UTCEPSS rescore
  5. 2026-09-07 16:40 UTCEG score recompute
  6. 2026-09-07 16:40 UTCGHSA enrichment
  7. 2026-09-06 17:56 UTCEG score recompute
  8. 2026-09-06 17:56 UTCGHSA enrichment
  9. 2026-09-06 13:48 UTCEPSS rescore
  10. 2026-09-05 19:11 UTCEG score recompute
  11. 2026-09-05 19:11 UTCGHSA enrichment
  12. 2026-09-05 15:31 UTCEPSS rescore
  13. 2026-09-04 20:27 UTCGHSA enrichment
  14. 2026-09-04 20:00 UTCEG score recompute▲ 5.40
  15. 2026-09-04 19:59 UTCGHSA enrichment
  16. 2026-09-04 19:59 UTCMITRE cvelistV5CVSS v3 → 5.4 · severity → MEDIUM
  17. 2026-09-04 05:07 UTCEPSS rescore
  18. 2026-09-03 17:14 UTCGHSA enrichment
  19. 2026-09-02 16:30 UTCNVD update
  20. 2026-09-02 15:50 UTCEG score recompute
  21. 2026-09-02 15:46 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-84666?
CVE-2026-84666 is a medium vulnerability published on September 2, 2026. Jenkins Job Configuration History Plugin 1367.vc8fab15101dc and earlier allows overwriting the plugin's history recording configuration through Stapler data binding, allowing attackers to redirect history storage to an attacker-specified directory and modify history recording settings.
When was CVE-2026-84666 disclosed?
CVE-2026-84666 was first published in the National Vulnerability Database on September 2, 2026, with the most recent update on September 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-84666 actively exploited?
CVE-2026-84666 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 99.0% of all scored CVEs.
What is the CVSS score of CVE-2026-84666?
CVE-2026-84666 has a CVSS v3.1 base score of 5.4 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-84666?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-84666, 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-2026-84666

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