CVE-2026-12459 Cross-site scripting in Chrome
Remote attackers can inject arbitrary scripts or HTML into Google Chrome via crafted pages, enabling user interface spoofing and potential code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-12459?
CVE-2026-12459 is a medium-severity cross-site scripting vulnerability in Google Chrome, published on 17 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
Inappropriate implementation in Serial in Google Chrome prior to 149.0.7827.155 allowed a remote attacker to inject arbitrary scripts or HTML (UXSS) via a crafted HTML page. (Chromium security severity: High)
Weakness: CWE-79
Which versions are affected by CVE-2026-12459?
It affects 1 product.
Products include Google Chrome.
How do I fix CVE-2026-12459?
Upgrade to a fixed version.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-12459 being exploited?
There is no known exploitation of CVE-2026-12459 in the wild and no public exploit code.
Other vulnerabilities in Google Chrome
Sources
Also known as DEBIAN-CVE-2026-12459, ECHO-c0fa-321c-6e4c, GHSA-f65r-rf8j-2jx8, MINI-23hp-m729-r747.