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Use-after-free in Google Chrome Web Authentication

IdentifiersCVE-2026-13029CWE-416

CVE-2026-13029 is a high-severity use-after-free vulnerability in the Web Authentication component of Google Chrome prior to 149.0.7827.197. The flaw is described as a memory-safety issue that can be triggered via a crafted Chrome extension. According to the provided content, exploitation requires an attacker to convince a user to install a malicious extension, after which the extension can potentially trigger heap corruption in the vulnerable Web Authentication code path. Public technical details about the precise vulnerable function or patch diff are not available in the provided material, as Google restricted detailed bug information pending broad deployment of the fix.

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ANALYST BRIEF

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.

Successful exploitation may cause heap corruption in the browser process, leading to application instability or crash, denial of service, information disclosure, and potentially arbitrary code execution within the browser context. The broader Chromium advisory notes that vulnerabilities in this release could result in arbitrary code execution, denial of service, or information disclosure, but the specific confirmed impact for this CVE in the provided content is potential heap corruption via a malicious extension.

Mitigation

If you can’t patch tonight, do this now.

Until patches are fully deployed, reduce exposure by preventing installation of untrusted or suspicious Chrome extensions. In enterprise environments, enforce extension allowlisting and installation restrictions through policy, permit only vetted extensions, and monitor for unauthorized extension installation.

Remediation

Patch, then assume compromise.

Upgrade Google Chrome to version 149.0.7827.197 or later. For downstream Chromium consumers, apply the corresponding vendor-supplied patched builds as they become available. Debian advises upgrading chromium to 149.0.7827.196-1~deb13u1 or later patched versions on affected systems.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

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.

VendorProductType
DebianChromiumapplication
GoogleChromeapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

6 SOURCESView more in app
What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.
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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity1

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2026-13029
NVD
nvd.nist.gov/vuln/detail/CVE-2026-13029
MITRE CWE · CWE-416
cwe.mitre.org