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CVE-2026-9123 is a heap buffer overflow vulnerability in the Chromecast component of Google Chrome. It affects Chrome on Android, Linux, and ChromeOS prior to version 148.0.7778.179. The flaw can be triggered by malicious network traffic and may corrupt heap memory within the affected Chromecast functionality. Google classified the issue as Medium severity. Successful exploitation allows arbitrary code execution within the Chrome sandbox.
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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.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A medium-severity heap buffer overflow vulnerability in Chromecast.
A medium-severity heap buffer overflow vulnerability in Chromecast-related functionality.
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.