Same Origin Policy Bypass in Google Chrome Input
CVE-2026-12453 is a high-severity vulnerability in Google Chrome prior to 149.0.7827.155 caused by insufficient validation of untrusted input in the Input component. According to the provided advisory text, a remote attacker who has already compromised the renderer process can use a crafted HTML page to bypass the browser's same origin policy. The issue is described as an input-validation failure rather than a memory-safety bug, and the vulnerable condition enables cross-origin restrictions to be circumvented from a compromised renderer context.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
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.
Recent activity
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-severity insufficient validation of untrusted input vulnerability in Chrome's Input component.
A high-severity insufficient validation of untrusted input vulnerability in Chrome Input.
The version that knows your environment.
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.