CVE-2026-12027

CRITICALPre-NVD 9.69.6—
EchelonGraph scoreMEDIUM 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
9.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.6Exploit: None knownExposed: 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
Vendor severity
HIGHper Google (Chromium)Vendor's own band, not a CVSS rating — advisory text: (Chromium security severity: High)
EG Score
9.6(medium)
EG Risk
48(Track)
EG Risk 48/100SSVC: 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
Severity96% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
13%
KEV
Not listed

Published

June 11, 2026

Last Modified

June 23, 2026

Advisory Details (2)

Auto-updated Aug 23, 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.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
chromium100.0.4896.127-1 ... 99.0.4844.84-1~deb11u1 (500 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
chromium113.0.5672.126-1 ... 149.0.7827.53-1~deb13u1 (369 versions)149.0.7827.114-1~deb12u1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
chromium138.0.7204.183-1 ... 149.0.7827.53-1~deb13u1 (135 versions)149.0.7827.114-1~deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
chromium138.0.7204.183-1 ... 149.0.7827.53-1~deb13u1 (136 versions)149.0.7827.114-1—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 26× in last 7d / 166× 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 387 total refreshes for this CVE.

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

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 0% probability of exploitation in the next 30 days, which ranks it in the top 87.2% of all scored CVEs.
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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