CVE-2026-16392

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-21. 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 — 3 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.

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

CVSS v3
9.1
EG Score
9.1(medium)
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%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
29%
KEV
Not listed

Published

July 21, 2026

Last Modified

August 6, 2026

Advisory Details (3)

Auto-updated Aug 1, 2026
No patch confirmed yet.
generic

Security Vulnerabilities fixed in Thunderbird 153 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-71/
generic

Security Vulnerabilities fixed in Firefox 153 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-68/
generic

Access Denied

https://bugzilla.mozilla.org/show_bug.cgi?id=2044606

Vendor Advisories for CVE-2026-16392(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 54× in last 7d / 230× 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 246 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-16392?
CVE-2026-16392 is a critical vulnerability published on July 21, 2026. JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.
When was CVE-2026-16392 disclosed?
CVE-2026-16392 was first published in the National Vulnerability Database on July 21, 2026, with the most recent update on August 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16392 actively exploited?
CVE-2026-16392 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 71.1% of all scored CVEs.
What is the CVSS score of CVE-2026-16392?
CVE-2026-16392 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-16392?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16392, 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

Explore the affected products and dependency analysis for CVE-2026-16392

Explore →

Is Your Infrastructure Affected by CVE-2026-16392?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs