CVE-2026-8090

HIGHPre-NVD 7.37.3—
EchelonGraph scoreMEDIUM confidence

Score 7.3 from GitHub Security Advisory (severity: HIGH) published 2026-05-07. NVD baseline CVSS 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.3
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.3Exploit: NoneExposed: 0

A fix is available — apply it.

Use-after-free in the DOM: Networking component. This vulnerability was fixed in Firefox 150.0.2, Firefox ESR 140.10.2, Firefox ESR 115.35.2, Thunderbird 150.0.2, and Thunderbird 140.10.2.

CVSS v3
7.3
EG Score
7.3(medium)
EG Risk
—
EPSS
23.9%
KEV
Not listed

Published

May 7, 2026

Last Modified

July 15, 2026

Advisory Details (4)

Auto-updated May 7, 2026
No patch confirmed yet.
generic

Security Vulnerabilities fixed in Firefox ESR 115.35.2 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-42/
generic

Security Vulnerabilities fixed in Firefox ESR 140.10.2 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-41/
generic

Security Vulnerabilities fixed in Firefox 150.0.2 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-40/
generic

Access Denied

https://bugzilla.mozilla.org/show_bug.cgi?id=2034352

Vendor Advisories for CVE-2026-8090(12)

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

Patch Availability(11)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatfirefox-0:140.10.2-1.el7_92026-06-10redhat
redhatfirefox-0:140.10.2-1.el8_62026-06-10redhat
redhatfirefox-0:140.10.2-1.el8_82026-06-09redhat
redhatfirefox-0:140.10.2-1.el9_22026-06-08redhat
redhatfirefox-0:140.10.2-1.el9_62026-06-08redhat
redhatfirefox-0:140.10.2-1.el9_42026-06-08redhat
redhatfirefox-0:140.10.2-1.el10_02026-06-08redhat
redhatfirefox-0:140.10.2-1.el8_42026-06-08redhat
redhatfirefox-0:140.10.2-1.el9_82026-05-26redhat
redhatfirefox-0:140.10.2-1.el8_102026-05-26redhat
redhatfirefox-0:140.10.2-1.el10_22026-05-19redhat

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.

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 40× 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.

Showing the most recent 100 of 132 total refreshes for this CVE.

  1. 2026-07-22 14:08 UTCEPSS rescore
  2. 2026-07-21 15:25 UTCEPSS rescore
  3. 2026-07-21 15:25 UTCEPSS rescore
  4. 2026-07-20 17:08 UTCEPSS rescore
  5. 2026-07-19 14:31 UTCEPSS rescore
  6. 2026-07-19 02:29 UTCEPSS rescore
  7. 2026-07-18 10:04 UTCEPSS rescore
  8. 2026-07-16 17:03 UTCEPSS rescore
  9. 2026-07-15 16:57 UTCEPSS rescore
  10. 2026-07-15 02:00 UTCEPSS rescore
  11. 2026-07-13 22:31 UTCEPSS rescore
  12. 2026-07-13 06:13 UTCEPSS rescore
  13. 2026-07-12 05:46 UTCEPSS rescore
  14. 2026-07-11 08:27 UTCEPSS rescore
  15. 2026-07-09 19:10 UTCEPSS rescore
  16. 2026-07-08 15:16 UTCEPSS rescore
  17. 2026-07-08 15:16 UTCEPSS rescore
  18. 2026-07-06 16:27 UTCEPSS rescore
  19. 2026-07-06 16:27 UTCEPSS rescore
  20. 2026-07-06 02:23 UTCEPSS rescore
  21. 2026-07-06 02:23 UTCEPSS rescore
  22. 2026-07-05 02:31 UTCEPSS rescore
  23. 2026-07-05 02:30 UTCEPSS rescore
  24. 2026-07-04 06:31 UTCEPSS rescore
  25. 2026-07-04 06:31 UTCEPSS rescore
Show 75 more
  1. 2026-07-01 15:07 UTCEPSS rescore
  2. 2026-06-30 23:22 UTCEPSS rescore
  3. 2026-06-29 14:06 UTCEPSS rescore
  4. 2026-06-28 14:07 UTCEPSS rescore
  5. 2026-06-28 09:32 UTCVendor advisory
  6. 2026-06-28 09:32 UTCGHSA enrichment
  7. 2026-06-28 04:56 UTCEPSS rescore
  8. 2026-06-27 14:34 UTCVendor advisory
  9. 2026-06-27 14:34 UTCGHSA enrichment
  10. 2026-06-27 03:08 UTCEPSS rescore
  11. 2026-06-26 22:16 UTCVendor advisory
  12. 2026-06-26 22:16 UTCGHSA enrichment
  13. 2026-06-25 13:50 UTCEPSS rescore
  14. 2026-06-24 14:05 UTCEPSS rescore
  15. 2026-06-23 21:33 UTCEPSS rescore
  16. 2026-06-22 14:25 UTCEPSS rescore
  17. 2026-06-21 14:56 UTCEPSS rescore
  18. 2026-06-21 01:59 UTCEPSS rescore
  19. 2026-06-19 19:26 UTCEPSS rescore
  20. 2026-06-18 17:52 UTCEPSS rescore
  21. 2026-06-17 17:53 UTCEPSS rescore
  22. 2026-06-17 06:06 UTCVendor advisory
  23. 2026-06-17 06:06 UTCGHSA enrichment
  24. 2026-06-16 17:53 UTCEPSS rescore
  25. 2026-06-15 17:49 UTCEPSS rescore
  26. 2026-06-15 17:49 UTCEPSS rescore
  27. 2026-06-15 08:04 UTCVendor advisory
  28. 2026-06-15 08:04 UTCGHSA enrichment
  29. 2026-06-14 23:18 UTCEPSS rescore
  30. 2026-06-14 19:11 UTCVendor advisory
  31. 2026-06-14 19:11 UTCGHSA enrichment
  32. 2026-06-14 07:02 UTCVendor advisory
  33. 2026-06-14 07:02 UTCGHSA enrichment
  34. 2026-06-13 23:00 UTCEPSS rescore
  35. 2026-06-12 23:12 UTCEPSS rescore
  36. 2026-06-12 23:12 UTCEPSS rescore
  37. 2026-06-12 21:52 UTCVendor advisory
  38. 2026-06-12 21:52 UTCGHSA enrichment
  39. 2026-06-12 01:14 UTCVendor advisory
  40. 2026-06-12 01:14 UTCGHSA enrichment
  41. 2026-06-11 14:00 UTCEPSS rescore
  42. 2026-06-11 13:05 UTCVendor advisory
  43. 2026-06-11 13:04 UTCGHSA enrichment
  44. 2026-06-11 00:53 UTCVendor advisory
  45. 2026-06-11 00:53 UTCGHSA enrichment
  46. 2026-06-10 22:19 UTCEPSS rescore
  47. 2026-06-10 13:22 UTCEPSS rescore
  48. 2026-06-10 11:50 UTCVendor advisory
  49. 2026-06-10 11:50 UTCGHSA enrichment
  50. 2026-06-09 23:41 UTCVendor advisory
  51. 2026-06-09 23:41 UTCGHSA enrichment
  52. 2026-06-09 11:32 UTCVendor advisory
  53. 2026-06-09 11:32 UTCGHSA enrichment
  54. 2026-06-08 23:24 UTCVendor advisory
  55. 2026-06-08 23:24 UTCGHSA enrichment
  56. 2026-06-08 14:17 UTCEPSS rescore
  57. 2026-06-08 11:13 UTCVendor advisory
  58. 2026-06-08 11:13 UTCGHSA enrichment
  59. 2026-06-07 23:02 UTCVendor advisory
  60. 2026-06-07 23:02 UTCGHSA enrichment
  61. 2026-06-07 15:25 UTCEPSS rescore
  62. 2026-06-07 10:53 UTCVendor advisory
  63. 2026-06-07 10:53 UTCGHSA enrichment
  64. 2026-06-06 22:45 UTCVendor advisory
  65. 2026-06-06 22:45 UTCGHSA enrichment
  66. 2026-06-06 13:47 UTCEPSS rescore
  67. 2026-06-06 10:36 UTCVendor advisory
  68. 2026-06-06 10:35 UTCGHSA enrichment
  69. 2026-06-05 22:47 UTCEPSS rescore
  70. 2026-06-05 22:27 UTCVendor advisory
  71. 2026-06-05 22:27 UTCGHSA enrichment
  72. 2026-06-05 10:18 UTCVendor advisory
  73. 2026-06-05 10:18 UTCGHSA enrichment
  74. 2026-06-05 06:10 UTCEPSS rescore
  75. 2026-06-04 22:10 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-8090?
CVE-2026-8090 is a high vulnerability published on May 7, 2026. Use-after-free in the DOM: Networking component. This vulnerability was fixed in Firefox 150.0.2, Firefox ESR 140.10.2, Firefox ESR 115.35.2, Thunderbird 150.0.2, and Thunderbird 140.10.2.
When was CVE-2026-8090 disclosed?
CVE-2026-8090 was first published in the National Vulnerability Database on May 7, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8090 actively exploited?
CVE-2026-8090 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 23.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-8090?
CVE-2026-8090 has a CVSS v3.1 base score of 7.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-8090?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8090, 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.

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