CVE-2026-17861 Privilege escalation in Chrome
A local attacker can achieve OS-level privilege escalation in Google Chrome by exploiting insufficient input validation in the Updater component via a malicious file.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-17861?
CVE-2026-17861 is a high-severity vulnerability in Google Chrome, published on 30 Jul 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 Updater in Google Chrome prior to 151.0.7922.72 allowed a local attacker to perform OS-level privilege escalation via a malicious file. (Chromium security severity: Medium)
Weakness: CWE-20
Which versions are affected by CVE-2026-17861?
It affects 1 product.
Products include Google Chrome.
How do I fix CVE-2026-17861?
Upgrade to a fixed version.
Is CVE-2026-17861 being exploited?
There is no known exploitation of CVE-2026-17861 in the wild and no public exploit code.
Other vulnerabilities in Google Chrome
Sources
Also known as DEBIAN-CVE-2026-17861, ECHO-2375-d1f1-479d, GHSA-m293-xcr4-f6hc, MINI-mrq9-8j64-5hmc.