Summary
CVE-2026-2441 is a high-severity flaw in the CSS component of Google Chrome that allows a remote attacker to execute arbitrary code inside the browser sandbox by luring users to a specially crafted HTML page. The vulnerability affects Chrome versions prior to 145.0.7632.75/76, has been actively exploited in the wild, is listed in CISA’s Known Exploited Vulnerabilities catalog, and requires immediate updating to version 145.0.7632.75 or later to remediate the risk.
Urgent Actions Required
- Upgrade Google Chrome to version 145.0.7632.75 or later (including builds addressing 145.0.7632.76 where applicable).
- Prioritize patch deployment across all systems due to confirmed active exploitation and CISA KEV listing.
- For continuous protection, enable automatic Chrome updates.
- Monitor for unusual Chrome behavior or unexpected code execution activity.
- To identify attacks, use or improve app control and EDR.
Which Systems Are Vulnerable to CVE-2026-2441?
Technical Overview
- Vulnerability Type: Use-After-Free (CWE-416) in the CSS component
- Affected Software/Versions:
- Google Chrome versions prior to 145.0.7632.75
- Related builds prior to 145.0.7632.76
- Attack Vector: Network (via crafted HTML page)
- CVSS Vector: v3.1
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: Required
- Scope: Unchanged
- Confidentiality Impact: High
- Integrity Impact: High
- Availability Impact: High
- Patch Availability: Yes, available
Chrome Releases: Stable Channel Update for Desktop
How Does the CVE-2026-2441 Exploit Work?
The attack typically follows these steps:
What Causes CVE-2026-2441?
Vulnerability Root Cause:
CVE-2026-2441 is a Use-After-Free flaw (CWE-416) in Chrome’s CSS component, where freed memory is later reused. Attackers can trigger this via crafted HTML pages, causing memory corruption and allowing arbitrary code execution inside the browser’s sandbox.
How Can You Mitigate CVE-2026-2441?
If immediate patching is delayed or not possible:
- Restrict or temporarily discontinue use of vulnerable Chrome versions until updates can be applied, as advised under CISA KEV guidance.
- Closely monitor systems for abnormal Chrome activity or unexpected code execution behavior.
- EDR safeguards should be strengthened in order to detect such exploitation attempts.
- Inform users that until computers are completely upgraded, they should refrain from visiting dubious or untrustworthy websites.
- To get the security fix as soon as possible, make sure automatic browser updates are turned on.
Which Assets and Systems Are at Risk?
- Asset Types Affected:
- Chrome versions before 145.0.7632.75/76
- Chromium-based browsers (e.g., Edge, Opera)
- Linux systems with affected Chromium packages (Alpine, Debian, NixOS)
- Business-Critical Systems at Risk:
- End-user workstations using vulnerable Chrome versions
- Managed devices with delayed browser updates
- Windows, macOS, or Linux systems running Chromium-based browsers
- Exposure Level:
- Any system where users can browse to external or untrusted websites using a vulnerable Chrome version
- Internet-connected endpoints where visiting a crafted HTML page could trigger the vulnerability
- Unpatched systems identified under CISA KEV guidance require remediation before the specified due date
Will Patching CVE-2026-2441 Cause Downtime?
Patch application impact: Minimal. Updating to Chrome 145.0.7632.75 or later resolves the issue and typically only requires a browser restart.
Mitigation (if immediate patching is not possible): Limit use of vulnerable versions, monitor for suspicious browser activity, and rely on endpoint detection controls. Complete protection requires updating to the fixed version.
How Can You Detect CVE-2026-2441 Exploitation?
Exploitation Signatures:
Monitor access to suspicious HTML pages followed by unusual Chrome activity. Public PoC exploits increase the risk of malicious web content being used in attacks.
Indicators of Compromise (IOCs/IOAs):
- Unusual code running inside the Chrome sandbox
- Signs of data or credential theft after visiting websites
- Unusual Chrome processes or crashes associated with memory corruption
Behavioral Indicators:
- Browser instability linked to CSS rendering activity
- Endpoint alerts related to memory corruption or sandboxed process abuse
- Security tools detecting anomalous activity originating from the browser process
Alerting Strategy:
- Priority: Critical
- Trigger alerts for:
- Suspicious Chrome process behavior
- Unexpected execution events
- EDR detections tied to browser-based exploitation attempts
Remediation & Response
- Remediation Timeline:
- Immediate: Update Chrome to 145.0.7632.75 or later.
- Soon: Deploy patches across all enterprise systems before March 10, 2026.
- Afterward: Verify no vulnerable versions remain on any endpoints.
- Rollback Plan:
- If issues arise after updating, revert to the previously deployed enterprise-approved browser version following internal change-control procedures.
- Document version changes, update timelines, and responsible personnel within the organization’s change management process.
- Incident Response Considerations:
- Identify systems running vulnerable Chrome builds and assess exposure to untrusted web content.
- Review endpoint and EDR logs for unusual Chrome behavior, memory corruption alerts, or suspicious sandbox activity.
- Check for signs of data theft or credential misuse after visits to external sites.
- Continue monitoring browser activity after patching to ensure the fix is effective.
Compliance & Governance Note
- Audit Trail Requirement:
- Track Chrome updates on Windows, macOS, and Linux
- Record patch dates, systems, and responsible staff
- Track confirmation that versions prior to 145.0.7632.75 (and related vulnerable builds) have been removed from the environment
- Policy Alignment:
- Update vulnerability management processes to prioritize KEV-listed vulnerabilities.
- Ensure browser update policies enforce automatic installation of security patches.
- Incorporate monitoring for abnormal browser behavior into endpoint security procedures.
CVSS Breakdown Table
| Metric | Value | Description |
|---|---|---|
| Base Score | 8.8 | High-severity vulnerability with significant impact and realistic exploit conditions |
| Attack Vector | Network | Can be triggered remotely through a crafted HTML page |
| Attack Complexity | Low | Does not require complex preconditions for successful exploitation |
| Privileges Required | None | No authentication or prior access needed |
| User Interaction | Required | Victim must visit a malicious or specially crafted web page |
| Scope | Unchanged | Impact is limited to the vulnerable browser component |
| Confidentiality Impact | High | Successful exploitation may expose sensitive information |
| Integrity Impact | High | Attackers may execute arbitrary code within the sandbox |
| Availability Impact | High | Memory corruption can affect browser stability and operation |
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