CVE-2026-16372

CRITICALPre-NVD 8.89.8▲
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-21. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 8.8; sources differ by 1.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

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

Privilege escalation in the DOM: Content Processes component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

CVSS v3
8.8
EG Score
9.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity98% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
22%
KEV
Not listed

Published

July 21, 2026

Last Modified

July 24, 2026

Advisory Details (3)

Auto-updated Jul 24, 2026
🔬 Proof of concept available. 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🟡 PoC Available

2013800 - (CVE-2026-16372) Missing Authorization in ContentParent::RecvAddCertException Allows Persistent TLS Certificate Override Injection

https://bugzilla.mozilla.org/show_bug.cgi?id=2013800

Vendor Advisories for CVE-2026-16372(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 36× in last 7d / 212× 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 269 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-16372?
CVE-2026-16372 is a critical vulnerability published on July 21, 2026. Privilege escalation in the DOM: Content Processes component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.
When was CVE-2026-16372 disclosed?
CVE-2026-16372 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-2026-16372 actively exploited?
CVE-2026-16372 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 78.3% of all scored CVEs.
What is the CVSS score of CVE-2026-16372?
CVE-2026-16372 has a CVSS v3.1 base score of 8.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.8.
How do I remediate CVE-2026-16372?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16372, 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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