CVE-2026-12034

HIGHPre-NVD 8.38.3—
EchelonGraph scoreHIGH confidence

Score 8.3 from GitHub Security Advisory (severity: HIGH) published 2026-06-12. 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 — 3 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.

Insufficient validation of untrusted input in Linux Toolkit Theming in Google Chrome on Linux prior to 149.0.7827.115 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a malicious file. (Chromium security severity: High)

CVSS v3
8.3
EG Score
8.3(high)
EPSS
7.8%
KEV
Not listed

Published

June 11, 2026

Last Modified

June 12, 2026

Advisory Details (2)

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

Chromium

https://issues.chromium.org/issues/519258799
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-2026-12034(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 32× in last 7d / 116× 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 116 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-12034?
CVE-2026-12034 is a high vulnerability published on June 11, 2026. Insufficient validation of untrusted input in Linux Toolkit Theming in Google Chrome on Linux prior to 149.0.7827.115 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a malicious file. (Chromium security severity: High)
When was CVE-2026-12034 disclosed?
CVE-2026-12034 was first published in the National Vulnerability Database on June 11, 2026, with the most recent update on June 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12034 actively exploited?
CVE-2026-12034 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-12034?
CVE-2026-12034 has a CVSS v3.1 base score of 8.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-12034?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12034, 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

Explore the affected products and dependency analysis for CVE-2026-12034

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