CVE-2026-74985

CRITICALPre-NVD 9.89.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-18. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: CISA-ADP (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory
Trending — 3 sources updated this week

Also known asEUVD-2026-60697 (ENISA EUVD) · GHSA-8j6x-f7qj-g59h (GitHub Security Advisories)Source: ENISA EUVD

9.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 9.8Exploit: None knownExposed services: Not assessed

The CVE record names the fixed release — apply it.

Privilege escalation in the Enterprise Policies component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
44
EG Risk 44/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity98% × 45%
Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (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: The CVE record names the fixed release. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
44th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.

EG Severity
9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-01). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

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

The CVE record names the fixed release. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (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

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 18, 2026

Last Modified

August 25, 2026

Advisory Details (5)

Auto-updated Oct 31, 2026
Fix named in the CVE record.
Web page

Security Vulnerabilities fixed in Thunderbird 153.1 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-80/
Web page

Security Vulnerabilities fixed in Thunderbird 154 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-78/
Web page

Security Vulnerabilities fixed in Firefox ESR 153.1 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-77/
Web page

Security Vulnerabilities fixed in Firefox 154 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-74/
Web page

2059825 - (CVE-2026-74985) Enterprise policy bypass and injection on Windows release builds: HKLM GPO read and alternateGPO/alternatePath redirects gated on raw isXpcshell without the Nightly restriction

https://bugzilla.mozilla.org/show_bug.cgi?id=2059825

Vendor Advisories for CVE-2026-74985(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 21× in last 7d / 98× 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 100 of 406 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. None are among the latest 100 rows. The 306 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 03:28 UTCEG score recompute
  2. 2026-11-02 03:28 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  3. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  4. 2026-11-01 02:56 UTCEG score recompute
  5. 2026-11-01 02:56 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  6. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  7. 2026-10-31 02:23 UTCEG score recompute
  8. 2026-10-31 02:23 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  9. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  10. 2026-10-30 01:51 UTCEG score recompute
  11. 2026-10-30 01:51 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  12. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  13. 2026-10-29 01:19 UTCEG score recompute
  14. 2026-10-29 01:19 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  15. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  16. 2026-10-28 00:46 UTCEG score recompute
  17. 2026-10-28 00:45 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  18. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  19. 2026-10-27 00:11 UTCEG score recompute
  20. 2026-10-27 00:10 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  21. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  22. 2026-10-25 20:01 UTCEG score recompute
  23. 2026-10-25 20:01 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  24. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  25. 2026-10-25 14:03 UTCEG score recompute
Show 75 more
  1. 2026-10-24 19:29 UTCEG score recompute
  2. 2026-10-24 19:29 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  3. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  4. 2026-10-23 18:57 UTCEG score recompute
  5. 2026-10-23 18:57 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  6. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  7. 2026-10-22 18:24 UTCEG score recompute
  8. 2026-10-22 18:24 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  9. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  10. 2026-10-21 17:51 UTCEG score recompute
  11. 2026-10-21 17:51 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  12. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  13. 2026-10-20 17:20 UTCEG score recompute
  14. 2026-10-20 17:20 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  15. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  16. 2026-10-19 16:47 UTCEG score recompute
  17. 2026-10-19 16:46 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  18. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  19. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  20. 2026-10-18 16:14 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  21. 2026-10-18 03:13 UTCEG score recompute
  22. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  23. 2026-10-17 15:42 UTCEG score recompute
  24. 2026-10-17 15:42 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  25. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  26. 2026-10-16 15:09 UTCEG score recompute
  27. 2026-10-16 15:09 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  28. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  29. 2026-10-15 14:34 UTCEG score recompute
  30. 2026-10-15 14:34 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  31. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  32. 2026-10-14 09:09 UTCEG score recompute
  33. 2026-10-14 09:09 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  34. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  35. 2026-10-13 06:09 UTCEG score recompute
  36. 2026-10-13 06:09 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  37. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  38. 2026-10-12 15:39 UTCEG score recompute
  39. 2026-10-12 05:37 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  40. 2026-10-11 19:25 UTCEG score recompute
  41. 2026-10-11 16:41 UTCEG score recompute
  42. 2026-10-11 14:00 UTCEG score recompute
  43. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  44. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  45. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  46. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  47. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  48. 2026-10-07 11:15 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  49. 2026-10-07 06:28 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  50. 2026-10-07 02:16 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  51. 2026-10-06 21:42 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  52. 2026-10-06 17:08 UTCEG score recompute
  53. 2026-10-06 17:08 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  54. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  55. 2026-10-06 12:56 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  56. 2026-10-06 08:49 UTCEG score recompute
  57. 2026-10-06 08:49 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  58. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  59. 2026-10-05 17:24 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  60. 2026-10-05 11:48 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  61. 2026-10-05 06:13 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  62. 2026-10-05 01:57 UTCEG score recompute
  63. 2026-10-05 01:57 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  64. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  65. 2026-10-04 21:45 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  66. 2026-10-04 16:22 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  67. 2026-10-04 11:43 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  68. 2026-10-04 07:14 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  69. 2026-10-04 03:11 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  70. 2026-10-03 22:15 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  71. 2026-10-03 17:42 UTCEG score recompute
  72. 2026-10-03 17:42 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  73. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  74. 2026-10-03 00:45 UTCGHSA enrichmentGHSA-8j6x-f7qj-g59h · GitHub severity CRITICAL · GitHub CVSS 9.8
  75. 2026-10-02 19:45 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-74985?
CVE-2026-74985 is a critical-severity vulnerability; its CVE record was published on August 18, 2026. Privilege escalation in the Enterprise Policies component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
When was the CVE record for CVE-2026-74985 published?
The CVE record for CVE-2026-74985 was published on August 18, 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 August 25, 2026; the record at its source may have been updated since.
Is CVE-2026-74985 actively exploited?
CVE-2026-74985 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (44th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-74985?
CVE-2026-74985 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-74985?
The CVE record for CVE-2026-74985 names the fix: "This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1." The vendor advisories EchelonGraph has for CVE-2026-74985 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-74985

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