CVE-2026-92019

HIGHPre-NVD 8.18.1
EchelonGraph scoreMEDIUM confidence

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

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-09-15. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: CISA-ADP (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory
Trending — 4 sources updated this week

Also known asEUVD-2026-78482 (ENISA EUVD) · GHSA-6gh2-567v-rrg3 (GitHub Security Advisories)Source: ENISA EUVD

8.1EG
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: 0.3%CVSS: 8.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Mitigation bypass in the Remote Settings Client component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.

CVSS v3
8.1
EG Score
8.1HIGHmedium confidence
EG Risk
37
EG Risk 37/100

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)
Severity81% × 45%
Impact severity (EG Severity): CVSS 8.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.3% × 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: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
23rd
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 (8.1): severity, escalated by confirmed exploitation. This CVE's 8.1 is its impact severity (EG Severity), not escalated.

EG Severity
8.1 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-29). 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).

A fix is available. 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

September 15, 2026

Last Modified

October 6, 2026

Advisory Details (8)

Auto-updated Sep 21, 2026
Patch available.
Web page

Security Vulnerabilities fixed in Thunderbird 153.3 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-96/
Web page

Security Vulnerabilities fixed in Thunderbird 140.16 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-95/
Web page

Security Vulnerabilities fixed in Thunderbird 156 — Mozilla

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

Security Vulnerabilities fixed in Firefox ESR 153.3 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-93/
Web page

Security Vulnerabilities fixed in Firefox ESR 140.16 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-92/
Web page

Security Vulnerabilities fixed in Firefox ESR 115.41 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-91/
Web page

Security Vulnerabilities fixed in Firefox 156 — Mozilla

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

Patch Availability(21)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatfirefox-0:140.16.0-1.el7_92026-10-15redhat
redhatfirefox-0:140.16.0-1.el9_42026-10-14redhat
redhatfirefox-0:140.16.0-1.el8_62026-10-14redhat
redhatfirefox-0:140.16.0-1.el10_02026-10-14redhat
redhatfirefox-0:140.16.0-1.el8_42026-10-14redhat
redhatfirefox-0:140.16.0-1.el9_62026-10-14redhat
redhatfirefox-0:140.16.0-1.el9_22026-10-14redhat
redhatfirefox-0:140.16.0-1.el8_82026-10-14redhat
redhatthunderbird-0:140.16.0-1.el8_82026-10-13redhat
redhatthunderbird-0:140.16.0-1.el8_62026-10-13redhat
redhatthunderbird-0:140.16.0-1.el8_42026-10-13redhat
redhatthunderbird-0:140.16.0-1.el9_62026-10-13redhat
redhatthunderbird-0:140.16.0-1.el9_22026-10-12redhat
redhatthunderbird-0:140.16.0-1.el9_42026-10-12redhat
redhatthunderbird-0:140.16.0-1.el10_02026-10-12redhat
redhatthunderbird-0:140.16.0-1.el8_102026-09-30redhat
redhatthunderbird-0:140.16.0-1.el10_22026-09-29redhat
redhatthunderbird-0:140.16.0-1.el9_82026-09-24redhat
redhatfirefox-0:140.16.0-1.el8_102026-09-24redhat
redhatfirefox-0:140.16.0-1.el10_22026-09-21redhat
redhatfirefox-0:140.16.0-1.el9_82026-09-21redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(6 across 3 ecosystems)
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
firefox-esr102.11.0esr-1 ... 140.9.1esr-1~deb13u1 (201 versions)
  • every version up to 140.16.0esr-1~deb12u1: fixed in 140.16.0esr-1~deb12u1
—
thunderbird1:102.11.0-1 ... 1:140.9.1esr-1~deb13u1 (229 versions)
  • every version up to 1:140.16.0esr-1~deb12u1: fixed in 1:140.16.0esr-1~deb12u1
—
Debian:13(2)
PackageVulnerable rangeFix by version rangeDependents
firefox-esr128.13.0esr-1 ... 140.9.1esr-1~deb13u1 (77 versions)
  • every version up to 140.16.0esr-1~deb13u1: fixed in 140.16.0esr-1~deb13u1
—
thunderbird1:128.13.0esr-1 ... 1:140.9.1esr-1~deb13u1 (85 versions)
  • every version up to 1:140.16.0esr-1~deb13u1: fixed in 1:140.16.0esr-1~deb13u1
—
Debian:14(2)
PackageVulnerable rangeFix by version rangeDependents
firefox-esr128.13.0esr-1 ... 140.9.1esr-1~deb13u1 (78 versions)
  • every version up to 140.16.0esr-1: fixed in 140.16.0esr-1
—
thunderbird1:128.13.0esr-1 ... 1:153.2.0esr-1 (97 versions)
  • every version up to 1:153.3.0esr-1: fixed in 1:153.3.0esr-1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 10× in last 7d / 86× 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 175 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 75 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  2. 2026-11-01 16:36 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  3. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  4. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  5. 2026-10-29 19:45 UTCEG score recompute
  6. 2026-10-29 19:45 UTCVendor advisory
  7. 2026-10-29 19:45 UTCGHSA enrichmentGHSA-6gh2-567v-rrg3 · GitHub severity HIGH · GitHub CVSS 8.1
  8. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  9. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  10. 2026-10-27 16:33 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  11. 2026-10-26 16:33 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  12. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  13. 2026-10-25 13:50 UTCEG score recompute
  14. 2026-10-24 16:34 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  15. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  16. 2026-10-22 18:07 UTCEG score recompute
  17. 2026-10-22 18:07 UTCVendor advisory
  18. 2026-10-22 18:07 UTCGHSA enrichmentGHSA-6gh2-567v-rrg3 · GitHub severity HIGH · GitHub CVSS 8.1
  19. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  20. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  21. 2026-10-20 16:34 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  22. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  23. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  24. 2026-10-18 03:00 UTCEG score recompute
  25. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
Show 75 more
  1. 2026-10-16 16:45 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  2. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  3. 2026-10-15 15:37 UTCEG score recompute
  4. 2026-10-15 15:37 UTCVendor advisory
  5. 2026-10-15 15:37 UTCGHSA enrichmentGHSA-6gh2-567v-rrg3 · GitHub severity HIGH · GitHub CVSS 8.1
  6. 2026-10-14 16:34 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  7. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  8. 2026-10-13 04:38 UTCEG score recompute
  9. 2026-10-13 04:38 UTCVendor advisory
  10. 2026-10-13 04:38 UTCGHSA enrichmentGHSA-6gh2-567v-rrg3 · GitHub severity HIGH · GitHub CVSS 8.1
  11. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  12. 2026-10-12 14:45 UTCEG score recompute
  13. 2026-10-11 19:35 UTCVendor advisory
  14. 2026-10-11 19:34 UTCGHSA enrichmentGHSA-6gh2-567v-rrg3 · GitHub severity HIGH · GitHub CVSS 8.1
  15. 2026-10-11 19:13 UTCEG score recompute
  16. 2026-10-11 16:29 UTCEG score recompute
  17. 2026-10-11 13:50 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  18. 2026-10-11 13:44 UTCEG score recompute
  19. 2026-10-11 06:35 UTCEG score recompute
  20. 2026-10-11 06:35 UTCVendor advisory
  21. 2026-10-11 06:35 UTCGHSA enrichmentGHSA-6gh2-567v-rrg3 · GitHub severity HIGH · GitHub CVSS 8.1
  22. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  23. 2026-10-10 17:42 UTCVendor advisory
  24. 2026-10-10 17:42 UTCGHSA enrichmentGHSA-6gh2-567v-rrg3 · GitHub severity HIGH · GitHub CVSS 8.1
  25. 2026-10-10 04:50 UTCEG score recompute
  26. 2026-10-10 04:50 UTCVendor advisory
  27. 2026-10-10 04:50 UTCGHSA enrichmentGHSA-6gh2-567v-rrg3 · GitHub severity HIGH · GitHub CVSS 8.1
  28. 2026-10-09 20:08 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  29. 2026-10-09 15:55 UTCVendor advisory
  30. 2026-10-09 15:54 UTCGHSA enrichmentGHSA-6gh2-567v-rrg3 · GitHub severity HIGH · GitHub CVSS 8.1
  31. 2026-10-08 22:41 UTCEG score recompute
  32. 2026-10-08 22:41 UTCVendor advisory
  33. 2026-10-08 22:41 UTCGHSA enrichmentGHSA-6gh2-567v-rrg3 · GitHub severity HIGH · GitHub CVSS 8.1
  34. 2026-10-08 17:14 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  35. 2026-10-08 07:43 UTCEG score recompute
  36. 2026-10-08 07:43 UTCVendor advisory
  37. 2026-10-08 07:42 UTCGHSA enrichmentGHSA-6gh2-567v-rrg3 · GitHub severity HIGH · GitHub CVSS 8.1
  38. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  39. 2026-10-07 18:59 UTCVendor advisory
  40. 2026-10-07 18:58 UTCGHSA enrichmentGHSA-6gh2-567v-rrg3 · GitHub severity HIGH · GitHub CVSS 8.1
  41. 2026-10-07 03:41 UTCEG score recompute
  42. 2026-10-07 03:41 UTCVendor advisory
  43. 2026-10-07 03:41 UTCGHSA enrichmentGHSA-6gh2-567v-rrg3 · GitHub severity HIGH · GitHub CVSS 8.1
  44. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  45. 2026-10-06 14:53 UTCVendor advisory
  46. 2026-10-06 14:53 UTCGHSA enrichmentGHSA-6gh2-567v-rrg3 · GitHub severity HIGH · GitHub CVSS 8.1
  47. 2026-10-06 02:36 UTCEG score recompute
  48. 2026-10-06 02:36 UTCVendor advisory
  49. 2026-10-06 02:36 UTCGHSA enrichmentGHSA-6gh2-567v-rrg3 · GitHub severity HIGH · GitHub CVSS 8.1
  50. 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  51. 2026-10-05 13:51 UTCVendor advisory
  52. 2026-10-05 13:51 UTCGHSA enrichmentGHSA-6gh2-567v-rrg3 · GitHub severity HIGH · GitHub CVSS 8.1
  53. 2026-10-05 01:09 UTCEG score recompute
  54. 2026-10-05 01:09 UTCVendor advisory
  55. 2026-10-05 01:09 UTCGHSA enrichmentGHSA-6gh2-567v-rrg3 · GitHub severity HIGH · GitHub CVSS 8.1
  56. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  57. 2026-10-04 12:15 UTCVendor advisory
  58. 2026-10-04 12:15 UTCGHSA enrichmentGHSA-6gh2-567v-rrg3 · GitHub severity HIGH · GitHub CVSS 8.1
  59. 2026-10-03 23:32 UTCEG score recompute
  60. 2026-10-03 23:32 UTCVendor advisory
  61. 2026-10-03 23:32 UTCGHSA enrichmentGHSA-6gh2-567v-rrg3 · GitHub severity HIGH · GitHub CVSS 8.1
  62. 2026-10-03 10:40 UTCVendor advisory
  63. 2026-10-03 10:40 UTCGHSA enrichmentGHSA-6gh2-567v-rrg3 · GitHub severity HIGH · GitHub CVSS 8.1
  64. 2026-10-02 21:49 UTCEG score recompute
  65. 2026-10-02 21:49 UTCVendor advisory
  66. 2026-10-02 21:49 UTCGHSA enrichmentGHSA-6gh2-567v-rrg3 · GitHub severity HIGH · GitHub CVSS 8.1
  67. 2026-10-02 09:06 UTCVendor advisory
  68. 2026-10-02 09:06 UTCGHSA enrichmentGHSA-6gh2-567v-rrg3 · GitHub severity HIGH · GitHub CVSS 8.1
  69. 2026-10-01 20:21 UTCEG score recompute
  70. 2026-10-01 20:21 UTCVendor advisory
  71. 2026-10-01 20:20 UTCGHSA enrichmentGHSA-6gh2-567v-rrg3 · GitHub severity HIGH · GitHub CVSS 8.1
  72. 2026-10-01 19:51 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  73. 2026-10-01 07:35 UTCVendor advisory
  74. 2026-10-01 07:35 UTCGHSA enrichmentGHSA-6gh2-567v-rrg3 · GitHub severity HIGH · GitHub CVSS 8.1
  75. 2026-09-30 18:52 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-92019?
CVE-2026-92019 is a high-severity vulnerability; its CVE record was published on September 15, 2026. Mitigation bypass in the Remote Settings Client component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
When was the CVE record for CVE-2026-92019 published?
The CVE record for CVE-2026-92019 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 6, 2026; the record at its source may have been updated since.
Is CVE-2026-92019 actively exploited?
CVE-2026-92019 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (23rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-92019?
CVE-2026-92019 has a CVSS v3.1 base score of 8.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-92019?
A fix for CVE-2026-92019 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-92019 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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