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High

Use-after-free in Google Chrome WebMIDI

IdentifiersCVE-2026-3923CWE-416· Use After Free

CVE-2026-3923 is a high-severity use-after-free vulnerability in the WebMIDI component of Google Chrome affecting versions prior to 146.0.7680.71. According to the provided content, a remote attacker could trigger the flaw via a crafted HTML page, leading to heap corruption. The vulnerable condition arises from improper lifetime management of memory in WebMIDI, where an object may be accessed after it has been freed, creating a memory-safety error that can destabilize the browser and potentially be shaped into further exploitation.

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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 result in heap corruption in the browser process. Based on the provided content, this could allow a remote attacker to potentially achieve more serious outcomes from a malicious web page, including browser compromise and possibly remote code execution, depending on exploitability and runtime conditions. At minimum, memory corruption bugs of this class can cause crashes or other undefined behavior.

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 web content until the update is applied. Because the issue is triggered via a crafted HTML page, standard browser hardening measures such as minimizing browsing to untrusted sites and applying updates promptly are relevant. However, the effective mitigation is vendor patching to Chrome 146.0.7680.71 or later.

Remediation

Patch, then assume compromise.

Upgrade Google Chrome to version 146.0.7680.71 or later on affected platforms. The provided content indicates that Chrome 146 was released to the stable channel for Windows, macOS, and Linux and includes the fix for this issue. Applying the vendor update and restarting the browser is the primary remediation.
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

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 activity4

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

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2026-3923
NVD
nvd.nist.gov/vuln/detail/CVE-2026-3923
MITRE CWE · CWE-416
Use After Free
Vendor Advisory
chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_10.html
Permissions Required
issues.chromium.org/issues/485935314