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Mallory
High

Sandbox Escape in Google Chrome Views

IdentifiersCVE-2026-12031CWE-693· Protection Mechanism Failure

CVE-2026-12031 is a high-severity vulnerability in the Views component of Google Chrome on Windows prior to 149.0.7827.115. The issue is described by Google as an inappropriate implementation flaw. According to the provided content, a remote attacker who has already compromised the renderer process can leverage a crafted HTML page to potentially escape Chrome’s sandbox. The flaw affects the browser’s sandbox boundary rather than being described as a direct memory corruption issue in the supplied material.

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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 can allow an attacker to break out of the Chrome renderer sandbox on affected Windows systems. Because the prerequisite is an already-compromised renderer process, this vulnerability is most relevant as a post-compromise escape that can turn renderer-level code execution into broader access outside the sandbox. The supplied content associates the issue with high impact to confidentiality, integrity, and availability.

Mitigation

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

No specific temporary workaround is provided in the supplied content. Mitigation is therefore limited to reducing exposure until patching can be completed: prioritize rapid browser updates, restrict use of untrusted web content, and apply defense-in-depth controls that make renderer compromise less likely. The primary mitigation is to install the vendor-provided fixed version.

Remediation

Patch, then assume compromise.

Upgrade Google Chrome on Windows to version 149.0.7827.115 or later. For Debian chromium packages, apply the vendor security update and upgrade to 149.0.7827.114-1~deb12u1 on Debian oldstable (bookworm) or 149.0.7827.114-1~deb13u1 on Debian stable (trixie), as provided in the advisory covering this CVE among multiple Chromium fixes.
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.

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.
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 activity3

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