CVE-2026-12466

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-17. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.8Exploit: NoneExposed: 0

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

Heap buffer overflow in WebRTC in Google Chrome on Windows prior to 149.0.7827.155 allowed a remote attacker to execute arbitrary code via a crafted HTML page. (Chromium security severity: High)

CVSS v3
8.8
EG Score
8.8(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
Severity88% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
34.8%
KEV
Not listed

Published

June 17, 2026

Last Modified

June 18, 2026

Advisory Details (2)

Auto-updated Jun 18, 2026
No patch confirmed yet.
generic

Chromium

https://issues.chromium.org/issues/520199394
generic

Chrome Releases: Stable Channel Update for Desktop

https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_01750511403.html

Vendor Advisories for CVE-2026-12466(2)

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 8× in last 7d / 112× 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 149 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-12466?
CVE-2026-12466 is a high vulnerability published on June 17, 2026. Heap buffer overflow in WebRTC in Google Chrome on Windows prior to 149.0.7827.155 allowed a remote attacker to execute arbitrary code via a crafted HTML page. (Chromium security severity: High)
When was CVE-2026-12466 disclosed?
CVE-2026-12466 was first published in the National Vulnerability Database on June 17, 2026, with the most recent update on June 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12466 actively exploited?
CVE-2026-12466 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 34.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-12466?
CVE-2026-12466 has a CVSS v3.1 base score of 8.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-12466?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12466, 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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