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Sandbox escape race condition in Google Chrome Updater on macOS

IdentifiersCVE-2026-12468CWE-362

CVE-2026-12468 is a high-severity race condition vulnerability in the Updater component of Google Chrome on macOS prior to version 149.0.7827.155. According to the provided advisory content, a remote attacker who had already compromised the renderer process could leverage the flaw via a crafted HTML page to potentially escape Chrome’s sandbox. The issue is described by Google as an inappropriate implementation in Updater, with the primary exploitation characteristic being a race in that component on Mac systems.

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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 could allow an attacker who already achieved renderer-process compromise to escape the browser sandbox on affected macOS systems. This would let the attacker execute actions outside the renderer’s sandbox restrictions and could enable further compromise of the browser or host environment as part of an exploit chain.

Mitigation

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

No specific workaround or temporary mitigation is provided in the supplied advisories beyond updating. Practical risk reduction prior to patching would require limiting exposure to malicious web content and reducing the likelihood of renderer compromise, but the provided sources do not document an official mitigation other than upgrading.

Remediation

Patch, then assume compromise.

Upgrade Google Chrome on macOS to version 149.0.7827.155 or later. For Chromium-based Microsoft Edge, upgrade to version 149.0.4022.80 or later, which incorporates the Chromium fix. Debian users should install the fixed chromium packages identified in the advisory stream where applicable.
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
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

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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-2026-12468
NVD
nvd.nist.gov/vuln/detail/CVE-2026-12468
MITRE CWE · CWE-362
cwe.mitre.org