CVE-2026-92034

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreHIGH confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-15. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
9.1EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 9.1Exploit: None knownExposed services: Not assessed

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

Site isolation issue in the Graphics component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.

CVSS v3
9.1
EG Score
9.1CRITICALhigh confidence
EG Risk
56
EG Risk 56/100

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 (value × EchelonGraph’s weight)
Severity91% × 45%
The EG Score, 9.1 of 10.
Exploitation0% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.3%
EPSS %ILE
18th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

Published

September 15, 2026

Last Modified

October 5, 2026

Advisory Details (3)

Auto-updated Sep 21, 2026
No fix on record yet.
generic

Security Vulnerabilities fixed in Thunderbird 156 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-94/
generic

Security Vulnerabilities fixed in Firefox 156 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-90/
generic

Access Denied

https://bugzilla.mozilla.org/show_bug.cgi?id=2060295

Vendor Advisories for CVE-2026-92034(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 53× in last 7d / 167× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 99 of 167 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 68 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-11 13:50 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  2. 2026-10-11 13:44 UTCEG score recompute
  3. 2026-10-11 09:44 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  4. 2026-10-11 05:44 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  5. 2026-10-10 20:07 UTCEG score recompute
  6. 2026-10-10 20:07 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  7. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  8. 2026-10-10 16:05 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  9. 2026-10-10 12:05 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  10. 2026-10-10 08:04 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  11. 2026-10-10 04:03 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  12. 2026-10-09 23:56 UTCEG score recompute
  13. 2026-10-09 23:56 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  14. 2026-10-09 20:08 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  15. 2026-10-09 19:54 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  16. 2026-10-09 15:54 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  17. 2026-10-09 06:42 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  18. 2026-10-09 02:41 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  19. 2026-10-08 22:41 UTCEG score recompute
  20. 2026-10-08 22:41 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  21. 2026-10-08 17:14 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  22. 2026-10-08 11:01 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  23. 2026-10-08 07:00 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  24. 2026-10-08 03:00 UTCEG score recompute
  25. 2026-10-08 03:00 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
Show 74 more
  1. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  2. 2026-10-07 22:59 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  3. 2026-10-07 18:58 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  4. 2026-10-07 14:34 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  5. 2026-10-07 10:25 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  6. 2026-10-07 06:24 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  7. 2026-10-07 02:21 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  8. 2026-10-06 22:20 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  9. 2026-10-06 18:20 UTCEG score recompute
  10. 2026-10-06 18:20 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  11. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  12. 2026-10-06 14:19 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  13. 2026-10-06 10:18 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  14. 2026-10-06 06:18 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  15. 2026-10-06 02:18 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  16. 2026-10-05 22:03 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  17. 2026-10-05 18:03 UTCEG score recompute
  18. 2026-10-05 18:03 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  19. 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  20. 2026-10-05 16:15 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  21. 2026-10-05 11:16 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  22. 2026-10-05 07:15 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  23. 2026-10-05 03:15 UTCEG score recompute
  24. 2026-10-05 03:15 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  25. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  26. 2026-10-04 23:15 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  27. 2026-10-04 19:14 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  28. 2026-10-04 14:55 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  29. 2026-10-04 10:54 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  30. 2026-10-04 06:54 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  31. 2026-10-04 02:54 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  32. 2026-10-03 22:53 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  33. 2026-10-03 18:52 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  34. 2026-10-03 14:48 UTCEG score recompute
  35. 2026-10-03 14:48 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  36. 2026-10-03 10:43 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  37. 2026-10-03 06:43 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  38. 2026-10-03 02:43 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  39. 2026-10-02 22:42 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  40. 2026-10-02 18:40 UTCEG score recompute
  41. 2026-10-02 18:40 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  42. 2026-10-02 14:38 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  43. 2026-10-02 10:28 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  44. 2026-10-02 06:28 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  45. 2026-10-02 02:28 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  46. 2026-10-01 22:27 UTCEG score recompute
  47. 2026-10-01 22:27 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  48. 2026-10-01 19:51 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  49. 2026-10-01 17:44 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  50. 2026-10-01 13:43 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  51. 2026-10-01 09:41 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  52. 2026-10-01 05:41 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  53. 2026-10-01 01:41 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  54. 2026-09-30 21:41 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  55. 2026-09-30 17:41 UTCEG score recompute
  56. 2026-09-30 17:41 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  57. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  58. 2026-09-30 13:38 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  59. 2026-09-30 09:35 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  60. 2026-09-30 05:23 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  61. 2026-09-30 01:12 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  62. 2026-09-29 16:56 UTCEG score recompute
  63. 2026-09-29 16:55 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  64. 2026-09-29 12:28 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  65. 2026-09-29 08:28 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  66. 2026-09-29 04:28 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  67. 2026-09-29 00:28 UTCEG score recompute
  68. 2026-09-29 00:27 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  69. 2026-09-28 20:26 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  70. 2026-09-28 16:26 UTCEG score recompute
  71. 2026-09-28 16:26 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  72. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  73. 2026-09-28 12:25 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1
  74. 2026-09-28 08:24 UTCGHSA enrichmentGHSA-3mrv-rm2p-hfgx · GitHub severity CRITICAL · GitHub CVSS 9.1

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-92034?
CVE-2026-92034 is a critical vulnerability published on September 15, 2026. Site isolation issue in the Graphics component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
When was the CVE record for CVE-2026-92034 published?
The CVE record for CVE-2026-92034 was published on September 15, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 5, 2026; the record at its source may have been updated since.
Is CVE-2026-92034 actively exploited?
CVE-2026-92034 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (18th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-92034?
CVE-2026-92034 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-92034?
No fix for CVE-2026-92034 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-92034 are linked in the Vendor Advisories panel on this page.

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