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CVE-2026-19557 is a high-severity use-after-free vulnerability in the TabStrip user interface component of Google Chrome on macOS prior to version 151.0.7922.137. The flaw arises from incorrect memory lifetime handling in TabStrip, allowing freed memory to be accessed after release. According to the available information, exploitation requires a remote attacker to first compromise the renderer process and then trigger the vulnerability via a crafted HTML page. Successful exploitation could enable a sandbox escape from the compromised renderer context into a more privileged browser process context.
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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.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-severity use-after-free vulnerability in Chrome's TabStrip interface.
A high-severity use-after-free vulnerability in Chrome TabStrip.
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.