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CVE-2026-3063 is a high-severity improper access-control vulnerability caused by an inappropriate implementation in Google Chrome DevTools. In versions prior to 145.0.7632.116, a malicious browser extension installed by a user can use DevTools to inject scripts or HTML into a privileged browser page, violating the intended security boundary between extension-controlled content and privileged pages.
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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.
15 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A specific vulnerability referenced in Gentoo GLSA-202608-31; technical details are not provided in the content.
Unknown (listed as a trending CVE affecting Google Chrome).
Unknown (listed as a trending CVE affecting Google Chrome; no technical details provided in the content).
A high-severity Google Chrome DevTools implementation flaw that allows malicious extensions to inject scripts into privileged pages, increasing risk for users with untrusted extensions installed.
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.