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CVE-2026-19153 is a high-severity insufficient validation of untrusted input vulnerability in the Workers component of Google Chrome. In versions prior to 151.0.7922.109, improper validation of attacker-controlled input in worker-related processing allowed a remote attacker, after first compromising the renderer process, to bypass Chrome's site isolation protections using a crafted HTML page. The flaw is a sandbox and browser security boundary weakening issue rather than a standalone initial code execution bug, and it affects the integrity of Chrome's cross-site isolation model.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability in Web Workers fixed in ChromeOS 151.
A high-severity insufficient validation of untrusted input vulnerability in Chrome Workers.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.