CVE-2026-12316

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreHIGH confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-16. 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
9.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.1Exploit: NoneExposed: 0

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

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 152 and Thunderbird 152.

CVSS v3
9.1
EG Score
9.1(high)
EPSS
15.7%
KEV
Not listed

Published

June 16, 2026

Last Modified

June 17, 2026

Advisory Details (3)

Auto-updated Jun 16, 2026
No patch confirmed yet.
generic

Security Vulnerabilities fixed in Thunderbird 152 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-60/
generic

Security Vulnerabilities fixed in Firefox 152 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-57/
generic

Access Denied

https://bugzilla.mozilla.org/show_bug.cgi?id=2045496

Vendor Advisories for CVE-2026-12316(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 81× in last 7d / 225× 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 225 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-12316?
CVE-2026-12316 is a critical vulnerability published on June 16, 2026. Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 152 and Thunderbird 152.
When was CVE-2026-12316 disclosed?
CVE-2026-12316 was first published in the National Vulnerability Database on June 16, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12316 actively exploited?
CVE-2026-12316 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 15.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-12316?
CVE-2026-12316 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-12316?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12316, 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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