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CVE-2026-12009 is a critical insufficient validation of untrusted input vulnerability in the Accessibility component of Google Chrome on macOS prior to version 149.0.7827.115. The flaw allows a remote attacker, after first compromising the renderer process, to leverage a crafted HTML page to trigger improper handling of untrusted input within Accessibility-related functionality and potentially escape Chrome’s sandbox. The issue is specific to Chrome on Mac and affects the boundary between a compromised renderer and more privileged browser or operating-system mediated functionality.
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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.
9 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical insufficient validation of untrusted input vulnerability in the Chrome Accessibility component that could be exploited via a specially crafted web page and contribute to arbitrary code execution or compromise.
A critical insufficient input validation vulnerability in Chrome Accessibility features that could potentially allow attackers to execute arbitrary code or gain control over affected systems.
A critical insufficient validation of untrusted input vulnerability in Chrome Accessibility.
A critical insufficient validation of untrusted input vulnerability in Chrome Accessibility.
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.