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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/Chromium. According to the provided content, affected versions are Google Chrome prior to 149.0.7827.197, and the issue can be triggered by a remote attacker via a crafted HTML page. The flaw results in a stale pointer or freed object being reused in FileSystem code, creating a heap corruption condition. While the vulnerable function is not identified in the provided material, the bug class and trigger conditions indicate a memory-safety error 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 cause heap corruption in the browser process and may lead to denial of service through a crash. The provided advisories further indicate potential browser compromise and possible arbitrary code execution in the context of the targeted Chrome instance when a victim visits a maliciously crafted HTML page.

Mitigation

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

Apply vendor security updates immediately. Until patched, reduce exposure by limiting use of untrusted websites and untrusted HTML content, and prioritize updates for all Chromium-based products in the environment. No specific workaround or feature-disable mitigation was provided in the supplied advisories.

Remediation

Patch, then assume compromise.

Upgrade Google Chrome to version 149.0.7827.197 or later. For Chromium on Debian stable (trixie), upgrade to 149.0.7827.196-1~deb13u1 or a later vendor-patched package. More generally, apply the corresponding upstream or downstream Chromium-based browser update as released by the vendor.
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-2026-13027
NVD
nvd.nist.gov/vuln/detail/CVE-2026-13027
MITRE CWE · CWE-416
cwe.mitre.org