CVE-2026-12027

CRITICALPre-NVD 9.69.6—
EchelonGraph scoreHIGH confidence

Score 9.6 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-12. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
9.6
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.6Exploit: NoneExposed: 0

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

Inappropriate implementation in Headless in Google Chrome prior to 149.0.7827.115 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)

CVSS v3
9.6
EG Score
9.6(high)
EPSS
13.0%
KEV
Not listed

Published

June 11, 2026

Last Modified

June 23, 2026

Advisory Details (2)

Auto-updated Jun 12, 2026
No patch confirmed yet.
generic

Chromium

https://issues.chromium.org/issues/517517155
generic

Chrome Releases: Stable Channel Update for Desktop

https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_01962725236.html

Vendor Advisories for CVE-2026-12027(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 70× in last 7d / 268× 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 268 total refreshes for this CVE.

  1. 2026-07-07 06:01 UTCEG score recompute
  2. 2026-07-07 06:01 UTCGHSA enrichment
  3. 2026-07-07 01:26 UTCEG score recompute
  4. 2026-07-07 01:26 UTCGHSA enrichment
  5. 2026-07-06 16:27 UTCEPSS rescore
  6. 2026-07-06 03:45 UTCEG score recompute
  7. 2026-07-06 03:44 UTCGHSA enrichment
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-05 23:24 UTCEG score recompute
  10. 2026-07-05 23:24 UTCGHSA enrichment
  11. 2026-07-05 19:16 UTCEG score recompute
  12. 2026-07-05 19:16 UTCGHSA enrichment
  13. 2026-07-05 15:08 UTCEG score recompute
  14. 2026-07-05 15:08 UTCGHSA enrichment
  15. 2026-07-05 10:58 UTCEG score recompute
  16. 2026-07-05 10:57 UTCGHSA enrichment
  17. 2026-07-05 02:30 UTCEPSS rescore
  18. 2026-07-05 02:30 UTCEPSS rescore
  19. 2026-07-04 23:48 UTCEG score recompute
  20. 2026-07-04 23:48 UTCGHSA enrichment
  21. 2026-07-04 19:38 UTCEG score recompute
  22. 2026-07-04 19:38 UTCGHSA enrichment
  23. 2026-07-04 15:26 UTCEG score recompute
  24. 2026-07-04 15:26 UTCGHSA enrichment
  25. 2026-07-04 11:09 UTCEG score recompute
Show 75 more
  1. 2026-07-04 11:08 UTCGHSA enrichment
  2. 2026-07-04 06:31 UTCEPSS rescore
  3. 2026-07-03 23:00 UTCEG score recompute
  4. 2026-07-03 23:00 UTCGHSA enrichment
  5. 2026-07-03 18:50 UTCEG score recompute
  6. 2026-07-03 18:50 UTCGHSA enrichment
  7. 2026-07-03 14:42 UTCEG score recompute
  8. 2026-07-03 14:42 UTCGHSA enrichment
  9. 2026-07-03 08:33 UTCEG score recompute
  10. 2026-07-03 08:32 UTCGHSA enrichment
  11. 2026-07-03 04:15 UTCEG score recompute
  12. 2026-07-03 04:15 UTCGHSA enrichment
  13. 2026-07-02 23:48 UTCEG score recompute
  14. 2026-07-02 23:48 UTCGHSA enrichment
  15. 2026-07-02 19:40 UTCEG score recompute
  16. 2026-07-02 19:40 UTCGHSA enrichment
  17. 2026-07-02 15:32 UTCEG score recompute
  18. 2026-07-02 15:32 UTCGHSA enrichment
  19. 2026-07-02 11:24 UTCEG score recompute
  20. 2026-07-02 11:24 UTCGHSA enrichment
  21. 2026-07-02 07:16 UTCEG score recompute
  22. 2026-07-02 07:16 UTCGHSA enrichment
  23. 2026-07-02 02:56 UTCEG score recompute
  24. 2026-07-02 02:56 UTCGHSA enrichment
  25. 2026-07-01 22:48 UTCEG score recompute
  26. 2026-07-01 22:48 UTCGHSA enrichment
  27. 2026-07-01 18:40 UTCEG score recompute
  28. 2026-07-01 18:40 UTCGHSA enrichment
  29. 2026-07-01 15:06 UTCEPSS rescore
  30. 2026-07-01 15:06 UTCEPSS rescore
  31. 2026-07-01 14:33 UTCEG score recompute
  32. 2026-07-01 14:33 UTCGHSA enrichment
  33. 2026-07-01 10:25 UTCEG score recompute
  34. 2026-07-01 10:25 UTCGHSA enrichment
  35. 2026-07-01 06:17 UTCEG score recompute
  36. 2026-07-01 06:17 UTCGHSA enrichment
  37. 2026-07-01 01:57 UTCEG score recompute
  38. 2026-07-01 01:57 UTCGHSA enrichment
  39. 2026-06-30 23:22 UTCEPSS rescore
  40. 2026-06-30 21:49 UTCEG score recompute
  41. 2026-06-30 21:49 UTCGHSA enrichment
  42. 2026-06-30 17:40 UTCEG score recompute
  43. 2026-06-30 17:40 UTCGHSA enrichment
  44. 2026-06-30 13:31 UTCEG score recompute
  45. 2026-06-30 13:31 UTCGHSA enrichment
  46. 2026-06-30 07:32 UTCEG score recompute
  47. 2026-06-30 07:32 UTCGHSA enrichment
  48. 2026-06-30 03:21 UTCEG score recompute
  49. 2026-06-30 03:21 UTCGHSA enrichment
  50. 2026-06-29 23:14 UTCEG score recompute
  51. 2026-06-29 23:13 UTCGHSA enrichment
  52. 2026-06-29 19:06 UTCEG score recompute
  53. 2026-06-29 19:06 UTCGHSA enrichment
  54. 2026-06-29 14:59 UTCEG score recompute
  55. 2026-06-29 14:59 UTCGHSA enrichment
  56. 2026-06-29 14:06 UTCEPSS rescore
  57. 2026-06-29 10:51 UTCEG score recompute
  58. 2026-06-29 10:51 UTCGHSA enrichment
  59. 2026-06-29 06:43 UTCEG score recompute
  60. 2026-06-29 06:43 UTCGHSA enrichment
  61. 2026-06-29 02:35 UTCEG score recompute
  62. 2026-06-29 02:35 UTCGHSA enrichment
  63. 2026-06-28 22:27 UTCEG score recompute
  64. 2026-06-28 22:27 UTCGHSA enrichment
  65. 2026-06-28 18:19 UTCEG score recompute
  66. 2026-06-28 18:19 UTCGHSA enrichment
  67. 2026-06-28 14:09 UTCEG score recompute
  68. 2026-06-28 14:09 UTCGHSA enrichment
  69. 2026-06-28 14:07 UTCEPSS rescore
  70. 2026-06-28 10:01 UTCEG score recompute
  71. 2026-06-28 10:00 UTCGHSA enrichment
  72. 2026-06-28 05:52 UTCEG score recompute
  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-2026-12027?
CVE-2026-12027 is a critical vulnerability published on June 11, 2026. Inappropriate implementation in Headless in Google Chrome prior to 149.0.7827.115 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)
When was CVE-2026-12027 disclosed?
CVE-2026-12027 was first published in the National Vulnerability Database on June 11, 2026, with the most recent update on June 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12027 actively exploited?
CVE-2026-12027 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 13.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-12027?
CVE-2026-12027 has a CVSS v3.1 base score of 9.6 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-12027?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12027, 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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