High

Use-after-free in Google Chrome Agents

IdentifiersCVE-2026-3917CWE-416· Use After Free

CVE-2026-3917 is a high-severity use-after-free vulnerability in the Agents component of Google Chrome affecting versions prior to 146.0.7680.71. According to the provided content, a remote attacker can trigger the flaw by luring a user to a crafted HTML page. The memory-safety error can result in heap corruption after freed memory is accessed by the browser, creating conditions that may be exploitable for further compromise.

For your environment

Are you exposed to this one?

Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.

Start free trial

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 lead to heap corruption in the browser process. The provided CVSS v3.1 vector (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) indicates potential for high impact to confidentiality, integrity, and availability. In practical terms, exploitation may enable serious browser compromise, including possible arbitrary code execution or browser crash/denial of service, although the supplied content specifically confirms heap corruption rather than a fully demonstrated end-state.

Mitigation

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

If immediate patching is not possible, reduce exposure by limiting use of untrusted or unknown websites and potentially malicious HTML content, since the issue is triggered via a crafted web page and requires user interaction. Because Google is restricting detailed technical information until users update, prompt deployment of the official Chrome update is the most effective mitigation.

Remediation

Patch, then assume compromise.

Upgrade Google Chrome to version 146.0.7680.71 or later on affected platforms. The provided content indicates the issue was fixed in the Chrome 146 stable channel release for Windows, macOS, and Linux. 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

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

7 SOURCESView more in app

cyber security newsNews

Mar 12, 2026

Chrome Security Update - Patch for 29 Vulnerabilities that Allows Remote Code Execution

High-severity use-after-free vulnerability in Chrome (component indicated as Agents in the content).

cvefeed high severityNews

Mar 11, 2026

CVE-2026-3917 - Google Chrome Use After Free Heap Corruption

A use-after-free (CWE-416) vulnerability in the Agents component of Google Chrome that could allow remote attackers to trigger heap corruption via a crafted HTML page.

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.

Start free trial

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