CVE-2026-16393

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: 1%CVSS: 9.1Exploit: None knownExposed: 0

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

Incorrect boundary conditions in the Graphics: WebGPU 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%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
43%
KEV
Not listed

Published

July 21, 2026

Last Modified

July 24, 2026

Advisory Details (3)

Auto-updated Aug 29, 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=2045410

Vendor Advisories for CVE-2026-16393(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 37× in last 7d / 215× 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 272 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-16393?
CVE-2026-16393 is a critical vulnerability published on July 21, 2026. Incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.
When was CVE-2026-16393 disclosed?
CVE-2026-16393 was first published in the National Vulnerability Database on July 21, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16393 actively exploited?
CVE-2026-16393 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 57.1% of all scored CVEs.
What is the CVSS score of CVE-2026-16393?
CVE-2026-16393 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-16393?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16393, 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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