CVE-2026-87528

CVE-2026-87528 is a type confusion flaw (CWE-843) in Rust-based code in Google Chrome on Windows. A remote attacker can trigger it by persuading a user to open a crafted HTML page, causing incorrect type handling in memory. Successful exploitation potentially allows execution of arbitrary code outside the browser sandbox, meaning an attacker's code would run beyond Chrome's renderer-level containment. Users running Google Chrome on Windows prior to 153.0.8010.36 are affected; no other products or platforms are named in the advisory. No in-the-wild exploitation is currently known: the flaw is not in CISA's KEV, EPSS assigns a 0.2% 30-day exploitation probability, and while the CVSS base score is 9.6 (critical), the Chromium project itself rates the issue Medium; one public reference (Chromium issue 539569491) exists.

What to do: Update Google Chrome on Windows to 153.0.8010.36 or later, verifying the installed version at chrome://settings/help or chrome://version. No workaround that prevents the type confusion is documented, so prioritize patching, especially for users who browse untrusted web content; note the vendor severity is Medium but the flaw can yield code execution outside the sandbox. Technical details may emerge at Chromium issue 539569491, worth monitoring for indicators or exploit development.