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Use-after-free in Google Chrome V8
CVE-2026-110921 is a use-after-free vulnerability in the V8 JavaScript engine in Google Chrome before version 155.0.8059.84. A remote attacker can trigger the vulnerability through a crafted HTML page to execute arbitrary code within the browser sandbox. Chromium classifies the vulnerability as High severity. The specific vulnerable function and memory-lifetime failure have not been disclosed.
What it means and what to do now: patch path, interim mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
Successful exploitation compromises code execution within the Chrome sandbox. This vulnerability alone does not establish a sandbox escape or unrestricted execution on the underlying operating system.
If you can’t patch tonight, do this now.
No vulnerability-specific workaround is documented.
Patch, then assume compromise.
Upgrade Google Chrome to version 155.0.8059.84 or later, using the applicable fixed release for the operating system, and restart the browser to activate the update. For distribution-packaged Chromium, install the vendor security update incorporating Chromium 155.0.8059.84 or later. Fedora package advisories additionally direct users to log out and log back in after installation.
No public exploits tracked yet. Mallory keeps watching.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
27 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.