CVE-2026-84117

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-09-01. 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.

Privilege escalation in Firefox for Android. This vulnerability was fixed in Firefox 155.

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
15%
KEV
Not listed

Published

September 1, 2026

Last Modified

September 3, 2026

Advisory Details (2)

Auto-updated Sep 1, 2026
No patch confirmed yet.
generic

Security Vulnerabilities fixed in Firefox 155 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-82/
generic

Access Denied

https://bugzilla.mozilla.org/show_bug.cgi?id=2053320

Vendor Advisories for CVE-2026-84117(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 25× in last 7d / 70× 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 00:39 UTCEG score recompute
  2. 2026-09-20 00:39 UTCGHSA enrichment
  3. 2026-09-19 11:43 UTCGHSA enrichment
  4. 2026-09-18 22:38 UTCEG score recompute
  5. 2026-09-18 22:38 UTCGHSA enrichment
  6. 2026-09-18 19:28 UTCEPSS rescore
  7. 2026-09-18 09:42 UTCGHSA enrichment
  8. 2026-09-17 20:46 UTCEG score recompute
  9. 2026-09-17 20:46 UTCGHSA enrichment
  10. 2026-09-17 19:32 UTCEPSS rescore
  11. 2026-09-17 03:38 UTCGHSA enrichment
  12. 2026-09-16 14:41 UTCEG score recompute
  13. 2026-09-16 14:41 UTCGHSA enrichment
  14. 2026-09-16 14:09 UTCEPSS rescore
  15. 2026-09-16 05:15 UTCEPSS rescore
  16. 2026-09-16 01:44 UTCGHSA enrichment
  17. 2026-09-15 12:47 UTCEG score recompute
  18. 2026-09-15 12:47 UTCGHSA enrichment
  19. 2026-09-15 03:12 UTCEPSS rescore
  20. 2026-09-15 03:12 UTCEPSS rescore
  21. 2026-09-14 23:50 UTCGHSA enrichment
  22. 2026-09-14 10:54 UTCGHSA enrichment
  23. 2026-09-13 21:57 UTCEG score recompute
  24. 2026-09-13 21:57 UTCGHSA enrichment
  25. 2026-09-13 09:00 UTCGHSA enrichment
Show 45 more
  1. 2026-09-12 20:04 UTCEG score recompute
  2. 2026-09-12 20:04 UTCGHSA enrichment
  3. 2026-09-12 07:07 UTCGHSA enrichment
  4. 2026-09-11 18:11 UTCEG score recompute
  5. 2026-09-11 18:11 UTCGHSA enrichment
  6. 2026-09-11 14:53 UTCEPSS rescore
  7. 2026-09-11 14:53 UTCEPSS rescore
  8. 2026-09-11 05:14 UTCGHSA enrichment
  9. 2026-09-10 16:17 UTCEG score recompute
  10. 2026-09-10 16:17 UTCGHSA enrichment
  11. 2026-09-10 03:03 UTCGHSA enrichment
  12. 2026-09-09 14:05 UTCGHSA enrichment
  13. 2026-09-09 01:07 UTCEG score recompute
  14. 2026-09-09 01:07 UTCGHSA enrichment
  15. 2026-09-08 22:01 UTCEPSS rescore
  16. 2026-09-08 12:11 UTCGHSA enrichment
  17. 2026-09-07 23:13 UTCEG score recompute
  18. 2026-09-07 23:13 UTCGHSA enrichment
  19. 2026-09-07 10:15 UTCGHSA enrichment
  20. 2026-09-06 21:18 UTCEG score recompute
  21. 2026-09-06 21:18 UTCGHSA enrichment
  22. 2026-09-06 13:48 UTCEPSS rescore
  23. 2026-09-06 08:21 UTCGHSA enrichment
  24. 2026-09-05 19:24 UTCEG score recompute
  25. 2026-09-05 19:24 UTCGHSA enrichment
  26. 2026-09-05 15:31 UTCEPSS rescore
  27. 2026-09-05 06:27 UTCGHSA enrichment
  28. 2026-09-04 17:28 UTCEG score recompute
  29. 2026-09-04 17:28 UTCGHSA enrichment
  30. 2026-09-04 05:07 UTCEPSS rescore
  31. 2026-09-04 04:31 UTCGHSA enrichment
  32. 2026-09-03 15:31 UTCGHSA enrichment
  33. 2026-09-03 08:56 UTCGHSA enrichment
  34. 2026-09-02 20:00 UTCEG score recompute
  35. 2026-09-02 20:00 UTCGHSA enrichment
  36. 2026-09-02 14:12 UTCEPSS rescore
  37. 2026-09-02 04:38 UTCGHSA enrichment
  38. 2026-09-02 04:02 UTCGHSA enrichment
  39. 2026-09-01 21:09 UTCEG score recompute
  40. 2026-09-01 21:09 UTCGHSA enrichment
  41. 2026-09-01 13:52 UTCEG score recompute▲ 8.80
  42. 2026-09-01 13:49 UTCMITRE cvelistV5CVSS v3 → 8.8 · severity → HIGH
  43. 2026-09-01 13:35 UTCNVD update
  44. 2026-09-01 12:45 UTCEG score recompute
  45. 2026-09-01 12:41 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-84117?
CVE-2026-84117 is a high vulnerability published on September 1, 2026. Privilege escalation in Firefox for Android. This vulnerability was fixed in Firefox 155.
When was CVE-2026-84117 disclosed?
CVE-2026-84117 was first published in the National Vulnerability Database on September 1, 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-2026-84117 actively exploited?
CVE-2026-84117 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 85.4% of all scored CVEs.
What is the CVSS score of CVE-2026-84117?
CVE-2026-84117 has a CVSS v3.1 base score of 8.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-84117?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-84117, 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-2026-84117

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