Google patches exploited Chrome zero-day CVE-2026-11645 in Chrome 149

Google released a Chrome 149 security update that fixes an actively exploited browser flaw, putting Chrome users at risk until they update. The zero-day, CVE-2026-11645, is a high-severity out-of-bounds read/write bug in the V8 JavaScript engine that can let a remote attacker run code inside Chrome’s sandbox via a specially crafted HTML page; exploitation likely requires chaining with a separate sandbox-escape flaw for full compromise. Google said the bug was reported in late April by an anonymous researcher.
Why it matters: Anyone using Chrome should update promptly because this flaw is already being used in real attacks. Even though the code runs inside Chrome’s sandbox, browser zero-days are high-priority because attackers often combine them with other bugs to fully compromise devices.

Sources

CISA Adds Cisco, Chrome, and Arista Flaws to KEV Catalog Amid Active Exploitation
info@thehackernews.com (The Hacker News) 2026.06.10 90% relevant
This article appears to advance the same Chrome event by reporting CISA has added the actively exploited Chrome flaw CVE-2026-11645 to KEV, reinforcing that exploitation is confirmed and that affected users and enterprises should prioritize updating Chrome 149 or later.
Chrome's zero-day Whac-A-Mole continues with fifth exploited bug of the year
2026.06.09 97% relevant
This article is a direct update on the same event, adding that CVE-2026-11645 is an out-of-bounds memory access bug in Chrome's V8 JavaScript engine, that Google paid a $55,000 bounty for the report, and that it is the fifth exploited Chrome zero-day fixed in 2026.
Chrome V8 Zero-Day CVE-2026-11645 Exploited in the Wild - Patch Now
info@thehackernews.com (The Hacker News) 2026.06.09 99% relevant
It covers the same underlying event: Google's patch for the actively exploited Chrome V8 zero-day CVE-2026-11645, reinforcing the urgency to update affected Chrome installations.
Google patches new Chrome zero-day flaw exploited in the wild
Sergiu Gatlan 2026.06.09 98% relevant
This article reports the same underlying event: Google's emergency fix for CVE-2026-11645, an in-the-wild exploited Chrome zero-day in Chrome 149, and adds rollout version details for Windows, macOS, and Linux plus technical context that the flaw is an out-of-bounds read/write bug in the V8 engine reachable via crafted HTML.
Google Patches 5th Chrome Zero-Day Exploited in 2026
Eduard Kovacs 2026.06.09 100% relevant
This article establishes a new tracked event centered on CVE-2026-11645, a distinct Chrome zero-day that Google says was exploited in the wild and patched in Chrome 149.
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