CVE-2026-92038

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 — 4 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: None knownExposed: 0

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

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

CVSS v3
9.1
EG Score
9.1(high)
EG Risk
56(Track)
EG Risk 56/100SSVC: 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
Severity91% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
40%
KEV
Not listed

Published

September 15, 2026

Last Modified

September 21, 2026

Advisory Details (5)

Auto-updated Sep 21, 2026
No patch confirmed yet.
generic

Security Vulnerabilities fixed in Thunderbird 153.3 — Mozilla

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

Security Vulnerabilities fixed in Thunderbird 156 — Mozilla

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

Security Vulnerabilities fixed in Firefox ESR 153.3 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-93/
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=2068952

Vendor Advisories for CVE-2026-92038(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 38× in last 7d / 52× 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 11:09 UTCGHSA enrichment
  2. 2026-09-25 07:18 UTCGHSA enrichment
  3. 2026-09-25 03:27 UTCGHSA enrichment
  4. 2026-09-24 23:36 UTCGHSA enrichment
  5. 2026-09-24 19:43 UTCGHSA enrichment
  6. 2026-09-24 15:52 UTCEG score recompute
  7. 2026-09-24 15:52 UTCGHSA enrichment
  8. 2026-09-24 14:04 UTCEPSS rescore
  9. 2026-09-24 12:02 UTCGHSA enrichment
  10. 2026-09-24 08:11 UTCGHSA enrichment
  11. 2026-09-24 04:20 UTCGHSA enrichment
  12. 2026-09-24 00:28 UTCGHSA enrichment
  13. 2026-09-23 20:38 UTCEG score recompute
  14. 2026-09-23 20:38 UTCGHSA enrichment
  15. 2026-09-23 17:54 UTCEPSS rescore
  16. 2026-09-23 16:47 UTCGHSA enrichment
  17. 2026-09-23 12:56 UTCGHSA enrichment
  18. 2026-09-23 09:06 UTCGHSA enrichment
  19. 2026-09-23 05:15 UTCGHSA enrichment
  20. 2026-09-23 01:24 UTCGHSA enrichment
  21. 2026-09-22 21:33 UTCGHSA enrichment
  22. 2026-09-22 17:42 UTCEG score recompute
  23. 2026-09-22 17:42 UTCGHSA enrichment
  24. 2026-09-22 16:01 UTCEPSS rescore
  25. 2026-09-22 13:45 UTCGHSA enrichment
Show 27 more
  1. 2026-09-22 09:54 UTCGHSA enrichment
  2. 2026-09-22 06:03 UTCGHSA enrichment
  3. 2026-09-22 02:13 UTCGHSA enrichment
  4. 2026-09-21 22:20 UTCEG score recompute
  5. 2026-09-21 22:20 UTCGHSA enrichment
  6. 2026-09-21 21:09 UTCEPSS rescore
  7. 2026-09-21 18:28 UTCGHSA enrichment
  8. 2026-09-21 17:31 UTCEG score recompute▲ 9.10
  9. 2026-09-21 17:30 UTCGHSA enrichment
  10. 2026-09-21 17:30 UTCMITRE cvelistV5CVSS v3 → 9.1 · severity → CRITICAL
  11. 2026-09-20 20:16 UTCEPSS rescore
  12. 2026-09-19 16:22 UTCGHSA enrichment
  13. 2026-09-18 19:28 UTCEPSS rescore
  14. 2026-09-17 19:32 UTCEPSS rescore
  15. 2026-09-16 19:58 UTCGHSA enrichment
  16. 2026-09-16 15:27 UTCGHSA enrichment
  17. 2026-09-16 15:19 UTCNVD update
  18. 2026-09-16 14:37 UTCEG score recompute
  19. 2026-09-16 14:37 UTCGHSA enrichment
  20. 2026-09-16 14:35 UTCMITRE cvelistV5
  21. 2026-09-16 14:09 UTCEPSS rescore
  22. 2026-09-15 20:45 UTCGHSA enrichment
  23. 2026-09-15 20:32 UTCNVD update
  24. 2026-09-15 20:19 UTCMITRE cvelistV5
  25. 2026-09-15 13:30 UTCNVD update
  26. 2026-09-15 12:38 UTCEG score recompute
  27. 2026-09-15 12:37 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-92038?
CVE-2026-92038 is a critical vulnerability published on September 15, 2026. Mitigation bypass in the Remote Settings Client component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
When was CVE-2026-92038 disclosed?
CVE-2026-92038 was first published in the National Vulnerability Database on September 15, 2026, with the most recent update on September 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-92038 actively exploited?
CVE-2026-92038 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 60.1% of all scored CVEs.
What is the CVSS score of CVE-2026-92038?
CVE-2026-92038 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-92038?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-92038, 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

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