CVE-2026-12437

HIGHPre-NVD 8.38.3—
EchelonGraph scoreHIGH confidence

Score 8.3 from GitHub Security Advisory (severity: HIGH) published 2026-06-17. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 8.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this week
8.3
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.3Exploit: NoneExposed: 0

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

Use after free in WebShare in Google Chrome on Windows prior to 149.0.7827.155 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)

CVSS v3
8.3
EG Score
8.3(high)
EPSS
19.7%
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/516496659
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-2026-12437(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 50× in last 7d / 137× 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 137 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-12437?
CVE-2026-12437 is a high vulnerability published on June 17, 2026. Use after free in WebShare in Google Chrome on Windows prior to 149.0.7827.155 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)
When was CVE-2026-12437 disclosed?
CVE-2026-12437 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-2026-12437 actively exploited?
CVE-2026-12437 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 19.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-12437?
CVE-2026-12437 has a CVSS v3.1 base score of 8.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-12437?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12437, 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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