CVE-2026-92068

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreHIGH confidence

Score 5.4 from GitHub Security Advisory published 2026-09-15. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
5.4EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 5.4Exploit: 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 Reader Mode component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.

CVSS v3
5.4
EG Score
5.4MEDIUMhigh confidence
EG Risk
24
EG Risk 24/100

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)
Severity54% × 45%
The EG Score, 5.4 of 10.
Exploitation0% × 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 every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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, and watch the vendor's advisory for the fix.
EPSS PROB
0.1%
EPSS %ILE
below the 1st
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (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 5, 2026

Advisory Details (5)

Auto-updated Sep 22, 2026
No fix on record 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=2058790

Vendor Advisories for CVE-2026-92068(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
thunderbird1:128.13.0esr-1 ... 1:155.0.1-2 (98 versions)
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 22× in last 7d / 74× 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.

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 75 is merged into the row it repeats.

  1. 2026-10-11 13:50 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  2. 2026-10-11 13:44 UTCEG score recompute
  3. 2026-10-11 05:43 UTCEG score recompute
  4. 2026-10-11 05:43 UTCGHSA enrichmentGHSA-jgrj-mv42-4xrq · GitHub CVSS 5.4
  5. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  6. 2026-10-10 01:35 UTCEG score recompute
  7. 2026-10-10 01:34 UTCGHSA enrichmentGHSA-jgrj-mv42-4xrq · GitHub CVSS 5.4
  8. 2026-10-09 20:08 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  9. 2026-10-09 00:03 UTCEG score recompute
  10. 2026-10-09 00:03 UTCGHSA enrichmentGHSA-jgrj-mv42-4xrq · GitHub CVSS 5.4
  11. 2026-10-08 17:14 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  12. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  13. 2026-10-07 22:36 UTCGHSA enrichmentGHSA-jgrj-mv42-4xrq · GitHub CVSS 5.4
  14. 2026-10-06 21:10 UTCEG score recompute
  15. 2026-10-06 21:10 UTCGHSA enrichmentGHSA-jgrj-mv42-4xrq · GitHub CVSS 5.4
  16. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  17. 2026-10-05 19:44 UTCEG score recompute
  18. 2026-10-05 19:44 UTCGHSA enrichmentGHSA-jgrj-mv42-4xrq · GitHub CVSS 5.4
  19. 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  20. 2026-10-05 10:02 UTCEG score recompute
  21. 2026-10-05 10:02 UTCGHSA enrichmentGHSA-jgrj-mv42-4xrq · GitHub CVSS 5.4
  22. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  23. 2026-10-04 08:36 UTCEG score recompute
  24. 2026-10-04 08:36 UTCGHSA enrichmentGHSA-jgrj-mv42-4xrq · GitHub CVSS 5.4
  25. 2026-10-03 07:10 UTCEG score recompute
Show 49 more
  1. 2026-10-03 07:10 UTCGHSA enrichmentGHSA-jgrj-mv42-4xrq · GitHub CVSS 5.4
  2. 2026-10-02 05:44 UTCEG score recompute
  3. 2026-10-02 05:44 UTCGHSA enrichmentGHSA-jgrj-mv42-4xrq · GitHub CVSS 5.4
  4. 2026-10-01 19:51 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  5. 2026-10-01 04:05 UTCEG score recompute
  6. 2026-10-01 04:05 UTCGHSA enrichmentGHSA-jgrj-mv42-4xrq · GitHub CVSS 5.4
  7. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  8. 2026-09-30 02:38 UTCEG score recompute
  9. 2026-09-30 02:38 UTCGHSA enrichmentGHSA-jgrj-mv42-4xrq · GitHub CVSS 5.4
  10. 2026-09-29 01:12 UTCEG score recompute
  11. 2026-09-29 01:12 UTCGHSA enrichmentGHSA-jgrj-mv42-4xrq · GitHub CVSS 5.4
  12. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  13. 2026-09-27 23:47 UTCEG score recompute
  14. 2026-09-27 23:47 UTCGHSA enrichmentGHSA-jgrj-mv42-4xrq · GitHub CVSS 5.4
  15. 2026-09-27 13:49 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  16. 2026-09-26 22:21 UTCEG score recompute
  17. 2026-09-26 22:21 UTCGHSA enrichmentGHSA-jgrj-mv42-4xrq · GitHub CVSS 5.4
  18. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  19. 2026-09-25 20:53 UTCGHSA enrichmentGHSA-jgrj-mv42-4xrq · GitHub CVSS 5.4
  20. 2026-09-24 19:16 UTCEG score recompute
  21. 2026-09-24 19:16 UTCGHSA enrichmentGHSA-jgrj-mv42-4xrq · GitHub CVSS 5.4
  22. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  23. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  24. 2026-09-23 17:50 UTCEG score recompute
  25. 2026-09-23 17:50 UTCGHSA enrichmentGHSA-jgrj-mv42-4xrq · GitHub CVSS 5.4
  26. 2026-09-22 16:24 UTCEG score recompute
  27. 2026-09-22 16:24 UTCGHSA enrichmentGHSA-jgrj-mv42-4xrq
  28. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  29. 2026-09-22 15:40 UTCEG score recompute▲ 5.40
  30. 2026-09-22 15:40 UTCGHSA enrichmentGHSA-jgrj-mv42-4xrq
  31. 2026-09-22 15:39 UTCMITRE cvelistV5CVSS v3 → 5.4 · severity → MEDIUM
  32. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  33. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  34. 2026-09-20 02:22 UTCGHSA enrichmentGHSA-jgrj-mv42-4xrq
  35. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  36. 2026-09-17 19:32 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  37. 2026-09-16 19:57 UTCGHSA enrichmentGHSA-jgrj-mv42-4xrq
  38. 2026-09-16 15:27 UTCGHSA enrichmentGHSA-jgrj-mv42-4xrq
  39. 2026-09-16 15:23 UTCNVD update
  40. 2026-09-16 14:36 UTCEG score recompute
  41. 2026-09-16 14:36 UTCGHSA enrichmentGHSA-jgrj-mv42-4xrq
  42. 2026-09-16 14:35 UTCMITRE cvelistV5
  43. 2026-09-16 14:09 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  44. 2026-09-15 20:44 UTCGHSA enrichmentGHSA-jgrj-mv42-4xrq
  45. 2026-09-15 20:32 UTCNVD update
  46. 2026-09-15 20:19 UTCMITRE cvelistV5
  47. 2026-09-15 13:30 UTCNVD update
  48. 2026-09-15 12:38 UTCEG score recompute
  49. 2026-09-15 12:37 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-92068?
CVE-2026-92068 is a medium-severity vulnerability; its CVE record was published on September 15, 2026. Site isolation issue in the Reader Mode component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
When was the CVE record for CVE-2026-92068 published?
The CVE record for CVE-2026-92068 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-2026-92068 actively exploited?
CVE-2026-92068 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (below the 1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-92068?
CVE-2026-92068 has a CVSS v3.1 base score of 5.4 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-92068?
No fix for CVE-2026-92068 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-2026-92068 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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