CVE-2026-84673

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-09-02. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.8Exploit: None knownExposed: 0

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

Jenkins Customizable Header Plugin 295.v2544b_ca_19b_97 and earlier allows overwriting the plugin's appearance configuration through Stapler data binding, allowing attackers to configure a custom SVG icon containing inline JavaScript, resulting in a stored cross-site scripting (XSS) vulnerability.

CVSS v3
8.8
EG Score
8.8(high)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity88% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
41%
KEV
Not listed

Published

September 2, 2026

Last Modified

September 3, 2026

Advisory Details (1)

Auto-updated Sep 2, 2026
No patch confirmed yet.
generic

Jenkins Security Advisory 2026-09-02

https://www.jenkins.io/security/advisory/2026-09-02/#SECURITY-4104

Vendor Advisories for CVE-2026-84673(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 27× in last 7d / 88× 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. 2026-09-25 08:31 UTCGHSA enrichment
  2. 2026-09-24 20:18 UTCEG score recompute
  3. 2026-09-24 20:18 UTCGHSA enrichment
  4. 2026-09-24 14:04 UTCEPSS rescore
  5. 2026-09-24 08:02 UTCGHSA enrichment
  6. 2026-09-23 19:49 UTCEG score recompute
  7. 2026-09-23 19:49 UTCGHSA enrichment
  8. 2026-09-23 17:54 UTCEPSS rescore
  9. 2026-09-23 06:23 UTCGHSA enrichment
  10. 2026-09-22 18:10 UTCEG score recompute
  11. 2026-09-22 18:10 UTCGHSA enrichment
  12. 2026-09-22 16:01 UTCEPSS rescore
  13. 2026-09-22 05:56 UTCEG score recompute
  14. 2026-09-22 05:56 UTCGHSA enrichment
  15. 2026-09-21 21:09 UTCEPSS rescore
  16. 2026-09-21 17:44 UTCGHSA enrichment
  17. 2026-09-21 05:30 UTCEG score recompute
  18. 2026-09-21 05:30 UTCGHSA enrichment
  19. 2026-09-20 20:16 UTCEPSS rescore
  20. 2026-09-20 17:15 UTCGHSA enrichment
  21. 2026-09-20 05:00 UTCGHSA enrichment
  22. 2026-09-19 16:45 UTCEG score recompute
  23. 2026-09-19 16:45 UTCGHSA enrichment
  24. 2026-09-19 04:32 UTCEG score recompute
  25. 2026-09-19 04:32 UTCGHSA enrichment
Show 63 more
  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 16:17 UTCGHSA enrichment
  3. 2026-09-18 03:47 UTCEG score recompute
  4. 2026-09-18 03:47 UTCGHSA enrichment
  5. 2026-09-17 19:32 UTCEPSS rescore
  6. 2026-09-17 15:34 UTCGHSA enrichment
  7. 2026-09-17 03:20 UTCGHSA enrichment
  8. 2026-09-16 15:07 UTCEG score recompute
  9. 2026-09-16 15:07 UTCGHSA enrichment
  10. 2026-09-16 14:09 UTCEPSS rescore
  11. 2026-09-16 05:15 UTCEPSS rescore
  12. 2026-09-16 02:54 UTCGHSA enrichment
  13. 2026-09-15 14:41 UTCEG score recompute
  14. 2026-09-15 14:41 UTCGHSA enrichment
  15. 2026-09-15 03:12 UTCEPSS rescore
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-15 02:27 UTCGHSA enrichment
  18. 2026-09-14 14:12 UTCGHSA enrichment
  19. 2026-09-14 01:59 UTCEG score recompute
  20. 2026-09-14 01:59 UTCGHSA enrichment
  21. 2026-09-13 13:46 UTCGHSA enrichment
  22. 2026-09-13 01:33 UTCEG score recompute
  23. 2026-09-13 01:33 UTCGHSA enrichment
  24. 2026-09-12 13:20 UTCGHSA enrichment
  25. 2026-09-12 01:07 UTCEG score recompute
  26. 2026-09-12 01:07 UTCGHSA enrichment
  27. 2026-09-11 14:53 UTCEPSS rescore
  28. 2026-09-11 14:53 UTCEPSS rescore
  29. 2026-09-11 12:54 UTCEG score recompute
  30. 2026-09-11 12:53 UTCGHSA enrichment
  31. 2026-09-11 00:07 UTCGHSA enrichment
  32. 2026-09-10 11:52 UTCEG score recompute
  33. 2026-09-10 11:52 UTCGHSA enrichment
  34. 2026-09-09 23:39 UTCGHSA enrichment
  35. 2026-09-09 11:25 UTCGHSA enrichment
  36. 2026-09-08 23:12 UTCEG score recompute
  37. 2026-09-08 23:12 UTCGHSA enrichment
  38. 2026-09-08 22:01 UTCEPSS rescore
  39. 2026-09-08 07:24 UTCGHSA enrichment
  40. 2026-09-07 19:11 UTCEG score recompute
  41. 2026-09-07 19:11 UTCGHSA enrichment
  42. 2026-09-07 06:57 UTCGHSA enrichment
  43. 2026-09-06 18:45 UTCEG score recompute
  44. 2026-09-06 18:45 UTCGHSA enrichment
  45. 2026-09-06 13:48 UTCEPSS rescore
  46. 2026-09-06 06:32 UTCGHSA enrichment
  47. 2026-09-05 18:18 UTCEG score recompute
  48. 2026-09-05 18:18 UTCGHSA enrichment
  49. 2026-09-05 15:31 UTCEPSS rescore
  50. 2026-09-05 06:05 UTCGHSA enrichment
  51. 2026-09-04 17:52 UTCEG score recompute
  52. 2026-09-04 17:52 UTCGHSA enrichment
  53. 2026-09-04 05:35 UTCEG score recompute
  54. 2026-09-04 05:35 UTCGHSA enrichment
  55. 2026-09-04 05:07 UTCEPSS rescore
  56. 2026-09-03 17:14 UTCGHSA enrichment
  57. 2026-09-03 05:52 UTCEG score recompute
  58. 2026-09-03 05:52 UTCGHSA enrichment
  59. 2026-09-02 17:03 UTCEG score recompute▲ 8.80
  60. 2026-09-02 17:01 UTCMITRE cvelistV5CVSS v3 → 8.8 · severity → HIGH
  61. 2026-09-02 16:30 UTCNVD update
  62. 2026-09-02 15:49 UTCEG score recompute
  63. 2026-09-02 15:46 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-84673?
CVE-2026-84673 is a high vulnerability published on September 2, 2026. Jenkins Customizable Header Plugin 295.v2544bca19b_97 and earlier allows overwriting the plugin's appearance configuration through Stapler data binding, allowing attackers to configure a custom SVG icon containing inline JavaScript, resulting in a stored cross-site scripting (XSS) vulnerability.
When was CVE-2026-84673 disclosed?
CVE-2026-84673 was first published in the National Vulnerability Database on September 2, 2026, with the most recent update on September 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-84673 actively exploited?
CVE-2026-84673 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 59.1% of all scored CVEs.
What is the CVSS score of CVE-2026-84673?
CVE-2026-84673 has a CVSS v3.1 base score of 8.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-84673?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-84673, 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

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