CVE-2026-13029 is a high-severity use-after-free vulnerability in the Web Authentication component of Google Chrome affecting versions prior to 149.0.7827.197. The flaw can be triggered through a crafted Chrome extension after a user installs the malicious extension. The vulnerable condition results in access to memory after it has been freed, creating a heap corruption scenario in the browser process or relevant component handling Web Authentication operations. As a memory-safety flaw, successful exploitation may destabilize the browser and can create conditions for further exploitation depending on allocator state and exploit reliability.
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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 high-severity use-after-free vulnerability in Chrome's Web Authentication component.
A high-severity use-after-free vulnerability in Chrome's Web Authentication component.
A high-severity use-after-free vulnerability in Chrome Web Authentication.
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.