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Use-after-Free in Google Chrome FileSystem

IdentifiersCVE-2026-13027CWE-416

CVE-2026-13027 is a high-severity use-after-free vulnerability in the FileSystem component of Google Chrome affecting versions prior to 149.0.7827.197. According to the provided advisory, a remote attacker could trigger the flaw by causing a target to load a crafted HTML page, leading to a use-after-free condition and resulting heap corruption. The available source material does not identify the specific vulnerable function or code path within FileSystem, but it does establish that the bug is memory-safety related and reachable through web content.

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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 corrupt heap memory in the Chrome renderer or related browser process context, causing a crash or other denial-of-service condition. Because the flaw is a use-after-free reachable via crafted HTML content, it may also be exploitable for arbitrary code execution or broader browser compromise, depending on exploit reliability and the target environment.

Mitigation

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

If immediate patching is not possible, reduce exposure by limiting use of untrusted websites and untrusted HTML content in Chrome until the update is deployed. Standard browser hardening measures such as restricting unnecessary browsing from sensitive systems and using Chrome's latest stable build wherever possible may reduce risk, but no specific vendor mitigation beyond updating was provided in the supplied content.

Remediation

Patch, then assume compromise.

Update Google Chrome to version 149.0.7827.197 or later. The broader Chrome Stable update referenced in the provided content is 149.0.7827.196/197 for Windows and Mac and 149.0.7827.196 for Linux; the advisory specifically states that versions prior to 149.0.7827.197 are affected. Apply the vendor-provided stable-channel security update across managed endpoints as soon as possible.
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

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

4 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-2026-13027
NVD
nvd.nist.gov/vuln/detail/CVE-2026-13027
MITRE CWE · CWE-416
cwe.mitre.org