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CVE-2026-76033 is a high-severity security restriction bypass vulnerability in Google Chrome caused by an inappropriate implementation in CORS. In versions prior to 151.0.7922.169, a remote attacker who had already compromised the renderer process could use a crafted HTML page to bypass Chrome's site isolation protections. The flaw affects the enforcement boundary intended to separate cross-site content and limit the impact of renderer compromise.
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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.
14 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An inappropriate implementation flaw in CORS in Chromium addressed by this security release.
An inappropriate implementation vulnerability in CORS in Chromium addressed in the Chromium 151.0.7922.169 security release.
An inappropriate implementation vulnerability in Chromium's CORS component addressed in Chromium security release 151.0.7922.169.
An inappropriate implementation vulnerability in CORS in Chromium addressed in this security release.
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.