CVE-2026-84649

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: 0%CVSS: 8.8Exploit: None knownExposed: 0

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

In Stapler 1839.ved17667b_a_eb_5 through 2107.v8dfcb_e8ed317 (both inclusive), except 2088.2093.vd7c3e58008a_6, included in Jenkins 2.447 through 2.579 (both inclusive), LTS 2.452.1 through 2.568.2 (both inclusive), an HTTP endpoint serving dynamically generated JavaScript resources embeds the user's cross-site request forgery (CSRF) token (crumb) as a string literal, allowing attackers with control over a page hosted on the same site as Jenkins to obtain a valid crumb for the targeted user's session and perform actions on their behalf.

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%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
7%
KEV
Not listed

Published

September 2, 2026

Last Modified

September 17, 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-3878

Vendor Advisories for CVE-2026-84649(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 28× in last 7d / 67× 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. 2026-09-20 04:57 UTCGHSA enrichment
  2. 2026-09-19 17:23 UTCEG score recompute
  3. 2026-09-19 17:23 UTCGHSA enrichment
  4. 2026-09-19 05:52 UTCEG score recompute
  5. 2026-09-19 05:52 UTCGHSA enrichment
  6. 2026-09-18 19:28 UTCEPSS rescore
  7. 2026-09-18 18:22 UTCGHSA enrichment
  8. 2026-09-18 06:51 UTCEG score recompute
  9. 2026-09-18 06:51 UTCGHSA enrichment
  10. 2026-09-17 19:32 UTCEPSS rescore
  11. 2026-09-17 19:20 UTCGHSA enrichment
  12. 2026-09-17 06:07 UTCGHSA enrichment
  13. 2026-09-16 18:36 UTCEG score recompute
  14. 2026-09-16 18:36 UTCGHSA enrichment
  15. 2026-09-16 14:09 UTCEPSS rescore
  16. 2026-09-16 05:56 UTCEG score recompute
  17. 2026-09-16 05:56 UTCGHSA enrichment
  18. 2026-09-16 05:15 UTCEPSS rescore
  19. 2026-09-15 18:26 UTCGHSA enrichment
  20. 2026-09-15 06:55 UTCEG score recompute
  21. 2026-09-15 06:55 UTCGHSA enrichment
  22. 2026-09-15 03:12 UTCEPSS rescore
  23. 2026-09-15 03:12 UTCEPSS rescore
  24. 2026-09-14 19:24 UTCGHSA enrichment
  25. 2026-09-14 07:52 UTCGHSA enrichment
Show 42 more
  1. 2026-09-13 20:22 UTCEG score recompute
  2. 2026-09-13 20:22 UTCGHSA enrichment
  3. 2026-09-13 08:51 UTCGHSA enrichment
  4. 2026-09-12 21:20 UTCEG score recompute
  5. 2026-09-12 21:20 UTCGHSA enrichment
  6. 2026-09-12 09:49 UTCGHSA enrichment
  7. 2026-09-11 22:18 UTCGHSA enrichment
  8. 2026-09-11 10:47 UTCEG score recompute
  9. 2026-09-11 10:47 UTCGHSA enrichment
  10. 2026-09-10 22:57 UTCGHSA enrichment
  11. 2026-09-10 11:26 UTCEG score recompute
  12. 2026-09-10 11:26 UTCGHSA enrichment
  13. 2026-09-09 23:31 UTCGHSA enrichment
  14. 2026-09-09 10:44 UTCGHSA enrichment
  15. 2026-09-08 23:13 UTCEG score recompute
  16. 2026-09-08 23:13 UTCGHSA enrichment
  17. 2026-09-08 22:01 UTCEPSS rescore
  18. 2026-09-08 02:22 UTCEG score recompute
  19. 2026-09-08 02:22 UTCGHSA enrichment
  20. 2026-09-07 14:52 UTCGHSA enrichment
  21. 2026-09-07 01:58 UTCGHSA enrichment
  22. 2026-09-06 14:27 UTCEG score recompute
  23. 2026-09-06 14:27 UTCGHSA enrichment
  24. 2026-09-06 13:48 UTCEPSS rescore
  25. 2026-09-06 02:56 UTCEG score recompute
  26. 2026-09-06 02:56 UTCGHSA enrichment
  27. 2026-09-05 15:31 UTCEPSS rescore
  28. 2026-09-05 15:25 UTCGHSA enrichment
  29. 2026-09-05 03:53 UTCGHSA enrichment
  30. 2026-09-04 16:21 UTCEG score recompute
  31. 2026-09-04 16:21 UTCGHSA enrichment
  32. 2026-09-04 05:07 UTCEPSS rescore
  33. 2026-09-04 04:49 UTCGHSA enrichment
  34. 2026-09-03 17:15 UTCGHSA enrichment
  35. 2026-09-03 06:08 UTCGHSA enrichment
  36. 2026-09-02 18:37 UTCEG score recompute
  37. 2026-09-02 18:37 UTCGHSA enrichment
  38. 2026-09-02 17:46 UTCEG score recompute▲ 8.80
  39. 2026-09-02 17:46 UTCMITRE cvelistV5CVSS v3 → 8.8 · severity → HIGH
  40. 2026-09-02 16:30 UTCNVD update
  41. 2026-09-02 15:51 UTCEG score recompute
  42. 2026-09-02 15:46 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-84649?
CVE-2026-84649 is a high vulnerability published on September 2, 2026. In Stapler 1839.ved17667baeb5 through 2107.v8dfcbe8ed317 (both inclusive), except 2088.2093.vd7c3e58008a_6, included in Jenkins 2.447 through 2.579 (both inclusive), LTS 2.452.1 through 2.568.2 (both inclusive), an HTTP endpoint serving dynamically generated JavaScript resources embeds the user's…
When was CVE-2026-84649 disclosed?
CVE-2026-84649 was first published in the National Vulnerability Database on September 2, 2026, with the most recent update on September 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-84649 actively exploited?
CVE-2026-84649 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 93.4% of all scored CVEs.
What is the CVSS score of CVE-2026-84649?
CVE-2026-84649 has a CVSS v3.1 base score of 8.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-84649?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-84649, 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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