CVE-2018-6121 Privilege escalation in Chrome

What is CVE-2018-6121?

CVE-2018-6121 is a high-severity vulnerability in Google Chrome, published on 27 Jun 2019. 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 input in Blink in Google Chrome prior to 66.0.3359.170 allowed a remote attacker to perform privilege escalation via a crafted HTML page.

Weakness: CWE-20

Which versions are affected by CVE-2018-6121?

It affects 1 product.

Products include Google Chrome.

How do I fix CVE-2018-6121?

Upgrade to a fixed version.

Is CVE-2018-6121 being exploited?

There is no known exploitation of CVE-2018-6121 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 GHSA-crqc-mc2m-phxx, UBUNTU-CVE-2018-6121.