CVE-2026-84132

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-01. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

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

Information disclosure in the Networking: HTTP component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
35%
KEV
Not listed

Published

September 1, 2026

Last Modified

September 3, 2026

Advisory Details (5)

Auto-updated Sep 3, 2026
No patch confirmed yet.
generic

Security Vulnerabilities fixed in Thunderbird 153.2 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-88/
generic

Security Vulnerabilities fixed in Thunderbird 155 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-86/
generic

Security Vulnerabilities fixed in Firefox ESR 153.2 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-85/
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=2063020

Vendor Advisories for CVE-2026-84132(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 / 95× 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 01:05 UTCEG score recompute
  2. 2026-09-25 01:05 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-24 13:40 UTCGHSA enrichment
  5. 2026-09-24 02:15 UTCEG score recompute
  6. 2026-09-24 02:15 UTCGHSA enrichment
  7. 2026-09-23 17:54 UTCEPSS rescore
  8. 2026-09-23 14:51 UTCGHSA enrichment
  9. 2026-09-23 03:28 UTCGHSA enrichment
  10. 2026-09-22 16:04 UTCEG score recompute
  11. 2026-09-22 16:04 UTCGHSA enrichment
  12. 2026-09-22 16:01 UTCEPSS rescore
  13. 2026-09-22 04:39 UTCEG score recompute
  14. 2026-09-22 04:39 UTCGHSA enrichment
  15. 2026-09-21 21:09 UTCEPSS rescore
  16. 2026-09-21 17:13 UTCGHSA enrichment
  17. 2026-09-21 05:08 UTCEG score recompute
  18. 2026-09-21 05:08 UTCGHSA enrichment
  19. 2026-09-20 20:16 UTCEPSS rescore
  20. 2026-09-20 17:16 UTCGHSA enrichment
  21. 2026-09-20 05:46 UTCGHSA enrichment
  22. 2026-09-19 18:22 UTCEG score recompute
  23. 2026-09-19 18:22 UTCGHSA enrichment
  24. 2026-09-19 06:58 UTCGHSA enrichment
  25. 2026-09-18 19:33 UTCEG score recompute
Show 70 more
  1. 2026-09-18 19:33 UTCGHSA enrichment
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-18 08:09 UTCGHSA enrichment
  4. 2026-09-17 20:45 UTCEG score recompute
  5. 2026-09-17 20:45 UTCGHSA enrichment
  6. 2026-09-17 19:32 UTCEPSS rescore
  7. 2026-09-17 06:06 UTCGHSA enrichment
  8. 2026-09-16 18:42 UTCEG score recompute
  9. 2026-09-16 18:42 UTCGHSA enrichment
  10. 2026-09-16 14:09 UTCEPSS rescore
  11. 2026-09-16 05:15 UTCEPSS rescore
  12. 2026-09-16 04:54 UTCGHSA enrichment
  13. 2026-09-15 17:30 UTCGHSA enrichment
  14. 2026-09-15 06:05 UTCEG score recompute
  15. 2026-09-15 06:05 UTCGHSA enrichment
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-15 03:12 UTCEPSS rescore
  18. 2026-09-14 18:39 UTCGHSA enrichment
  19. 2026-09-14 07:15 UTCGHSA enrichment
  20. 2026-09-13 19:51 UTCEG score recompute
  21. 2026-09-13 19:51 UTCGHSA enrichment
  22. 2026-09-13 08:26 UTCGHSA enrichment
  23. 2026-09-12 21:03 UTCEG score recompute
  24. 2026-09-12 21:03 UTCGHSA enrichment
  25. 2026-09-12 09:39 UTCGHSA enrichment
  26. 2026-09-11 22:15 UTCEG score recompute
  27. 2026-09-11 22:15 UTCGHSA enrichment
  28. 2026-09-11 14:53 UTCEPSS rescore
  29. 2026-09-11 14:53 UTCEPSS rescore
  30. 2026-09-11 10:49 UTCEG score recompute
  31. 2026-09-11 10:49 UTCGHSA enrichment
  32. 2026-09-10 23:01 UTCGHSA enrichment
  33. 2026-09-10 11:37 UTCEG score recompute
  34. 2026-09-10 11:37 UTCGHSA enrichment
  35. 2026-09-09 23:39 UTCGHSA enrichment
  36. 2026-09-09 10:51 UTCGHSA enrichment
  37. 2026-09-08 23:27 UTCEG score recompute
  38. 2026-09-08 23:26 UTCGHSA enrichment
  39. 2026-09-08 22:01 UTCEPSS rescore
  40. 2026-09-08 02:19 UTCEG score recompute
  41. 2026-09-08 02:19 UTCGHSA enrichment
  42. 2026-09-07 14:55 UTCGHSA enrichment
  43. 2026-09-07 02:40 UTCGHSA enrichment
  44. 2026-09-06 15:14 UTCEG score recompute
  45. 2026-09-06 15:14 UTCGHSA enrichment
  46. 2026-09-06 13:48 UTCEPSS rescore
  47. 2026-09-06 03:50 UTCGHSA enrichment
  48. 2026-09-05 16:25 UTCEG score recompute
  49. 2026-09-05 16:25 UTCGHSA enrichment
  50. 2026-09-05 15:31 UTCEPSS rescore
  51. 2026-09-05 05:00 UTCGHSA enrichment
  52. 2026-09-04 17:35 UTCEG score recompute
  53. 2026-09-04 17:35 UTCGHSA enrichment
  54. 2026-09-04 06:11 UTCEG score recompute
  55. 2026-09-04 06:11 UTCGHSA enrichment
  56. 2026-09-04 05:07 UTCEPSS rescore
  57. 2026-09-03 18:48 UTCEG score recompute
  58. 2026-09-03 18:47 UTCGHSA enrichment
  59. 2026-09-03 17:34 UTCEG score recompute▲ 7.50
  60. 2026-09-03 17:33 UTCGHSA enrichment
  61. 2026-09-03 17:33 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  62. 2026-09-02 14:12 UTCEPSS rescore
  63. 2026-09-01 22:19 UTCGHSA enrichment
  64. 2026-09-01 22:18 UTCNVD update
  65. 2026-09-01 21:43 UTCGHSA enrichment
  66. 2026-09-01 21:42 UTCMITRE cvelistV5
  67. 2026-09-01 21:09 UTCGHSA enrichment
  68. 2026-09-01 13:35 UTCNVD update
  69. 2026-09-01 12:44 UTCEG score recompute
  70. 2026-09-01 12:41 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-84132?
CVE-2026-84132 is a high vulnerability published on September 1, 2026. Information disclosure in the Networking: HTTP component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.
When was CVE-2026-84132 disclosed?
CVE-2026-84132 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-2026-84132 actively exploited?
CVE-2026-84132 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 64.6% of all scored CVEs.
What is the CVSS score of CVE-2026-84132?
CVE-2026-84132 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-84132?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-84132, 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.

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