CVE-2026-13863 Privilege escalation in Chrome

What is CVE-2026-13863?

CVE-2026-13863 is a high-severity vulnerability in Google Chrome, published on 30 Jun 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

Insufficient validation of untrusted input in CustomTabs in Google Chrome on Android prior to 150.0.7871.47 allowed a local attacker to perform privilege escalation via a malicious file. (Chromium security severity: Medium)

Weakness: CWE-20

Which versions are affected by CVE-2026-13863?

It affects 1 product.

Products include Google Chrome.

How do I fix CVE-2026-13863?

Upgrade to a fixed version.

Is CVE-2026-13863 being exploited?

There is no known exploitation of CVE-2026-13863 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-2026-13863, ECHO-031a-b650-32dd, GHSA-j37g-2qp6-q3pv, MINI-3xwh-w8f9-5c56.