CVE-2026-8090

HIGHPre-NVD 7.37.3—
EchelonGraph scoreMEDIUM confidence

Score 7.3 from GitHub Security Advisory (severity: HIGH) published 2026-05-07. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
7.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.3Exploit: None knownExposed: 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
48(Track)
EG Risk 48/100SSVC: 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
Severity73% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
24%
KEV
Not listed

Published

May 7, 2026

Last Modified

July 29, 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(20)

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

Patch Availability(21)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatthunderbird-0:140.11.0-1.el8_62026-06-17redhat
redhatthunderbird-0:140.11.0-1.el10_02026-06-17redhat
redhatthunderbird-0:140.11.0-1.el9_62026-06-17redhat
redhatthunderbird-0:140.11.0-1.el9_42026-06-16redhat
redhatthunderbird-0:140.11.0-1.el8_82026-06-16redhat
redhatthunderbird-0:140.11.0-1.el9_22026-06-16redhat
redhatthunderbird-0:140.11.0-1.el8_42026-06-16redhat
redhatfirefox-0:140.10.2-1.el8_62026-06-10redhat
redhatfirefox-0:140.10.2-1.el7_92026-06-10redhat
redhatfirefox-0:140.10.2-1.el8_82026-06-09redhat
redhatfirefox-0:140.10.2-1.el9_42026-06-08redhat
redhatfirefox-0:140.10.2-1.el8_42026-06-08redhat
redhatfirefox-0:140.10.2-1.el9_62026-06-08redhat
redhatfirefox-0:140.10.2-1.el9_22026-06-08redhat
redhatfirefox-0:140.10.2-1.el10_02026-06-08redhat
redhatthunderbird-0:140.11.0-1.el8_102026-06-03redhat
redhatthunderbird-0:140.11.0-1.el10_22026-06-01redhat
redhatthunderbird-0:140.11.0-1.el9_82026-05-27redhat
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.

Affected Packages

(8 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
firefox-esr102.1.0esr-1 ... 91.9.1esr-1~deb9u1 (271 versions)140.10.2esr-1~deb11u1—
thunderbird1:102.0.1-1 ... 1:91.9.0-1~deb9u1 (322 versions)1:140.10.2esr-1~deb11u1—
Debian:12(2)
PackageVulnerable rangeFixed inDependents
firefox-esr102.11.0esr-1 ... 140.9.1esr-1~deb13u1 (178 versions)140.10.2esr-1~deb12u1—
thunderbird1:102.11.0-1 ... 1:140.9.1esr-1~deb13u1 (207 versions)1:140.10.2esr-1~deb12u1—
Debian:13(2)
PackageVulnerable rangeFixed inDependents
firefox-esr128.13.0esr-1 ... 140.9.1esr-1~deb13u1 (54 versions)140.10.2esr-1~deb13u1—
thunderbird1:128.13.0esr-1 ... 1:140.9.1esr-1~deb13u1 (63 versions)1:140.10.2esr-1~deb13u1—
Debian:14(2)
PackageVulnerable rangeFixed inDependents
firefox-esr128.13.0esr-1 ... 140.9.1esr-1~deb13u1 (55 versions)140.10.2esr-1—
thunderbird1:128.13.0esr-1 ... 1:140.9.1esr-1~deb13u1 (64 versions)1:140.10.2esr-1—

Weakness Classification(2)

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

Additional Vendor Advisories

(2)

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 5× in last 7d / 35× 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 248 total refreshes for this CVE.

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

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 29, 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 0% probability of exploitation in the next 30 days, which ranks it in the top 75.6% of all scored CVEs.
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.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-8090

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