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CVE-2026-12034 Google CVE debrief

CVE-2026-12034 is a High-severity vulnerability in Google Chrome on Linux. Insufficient validation of untrusted input in Linux Toolkit Theming allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a malicious file. The vulnerability was published on [cvePublishedAt] and modified on [cveModifiedAt].

Vendor
Google
Product
Chrome
CVSS
HIGH 8.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-11
Original CVE updated
2026-06-12
Advisory published
2026-06-11
Advisory updated
2026-06-12

Who should care

Users of Google Chrome on Linux prior to version 149.0.7827.115 should update to the latest version to mitigate this vulnerability.

Technical summary

The vulnerability has a CVSS score of 8.3 and is classified as High severity. The CVSS vector is CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H. The weakness is related to CWE-20.

Defensive priority

High

Recommended defensive actions

  • Update Google Chrome to version 149.0.7827.115 or later.
  • Refer to [ref-4] for mitigation or vendor reference.
  • Refer to [ref-5] for additional information.

Evidence notes

Evidence from NVD and CVE.org.

Official resources

CVE-2026-12034 was published on 2026-06-11T22:16:55.987Z and modified on 2026-06-12T17:58:48.203Z.