CVE-2026-12034 Other in Chrome

What is CVE-2026-12034?

CVE-2026-12034 is a high-severity vulnerability in Google Chrome, published on 11 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

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)

Weakness: CWE-20

Which versions are affected by CVE-2026-12034?

It affects 1 product.

Products include Google Chrome.

How do I fix CVE-2026-12034?

Upgrade to a fixed version.

Is CVE-2026-12034 being exploited?

There is no known exploitation of CVE-2026-12034 in the wild and no public exploit code.

Other vulnerabilities in Google Chrome

• CVE-2022-4135 Google Chromium GPU Heap Buffer Overflow Exploited Critical 9.6
• CVE-2020-16017 Google Chrome Use-After-Free Exploited Critical 9.6
• CVE-2020-16010 Google Chrome for Android UI Heap Buffer Overflow Exploited Critical 9.6
• CVE-2026-87491 Google Chromium V8 Out of Bounds Write Exploited High 8.8
• CVE-2026-85046 Google Chromium V8 Type Confusion Exploited High 8.8

All Google Chrome vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2026-12034, ECHO-cd52-aad2-2b33, GHSA-cc2r-m9h8-v7mj, MINI-6gq6-jg42-472j.