CVE-2026-13799: Critical QUIC Use-After-Free in Google Chrome – Patch Guidance

Technical summary

CVE-2026-13799 is a use-after-free vulnerability (CWE-416) in the QUIC implementation within Google Chrome versions prior to 150.0.7871.47. The defect allows remote attackers to cause heap corruption through malicious network traffic. QUIC, the underlying protocol used for HTTP/3, is a network-level component that processes incoming packets without requiring user interaction. The vulnerability's CVSS v3.1 score of 8.1 reflects high impact (confidentiality, integrity, and availability) but moderate attack complexity, indicating that while exploitation is network-dependent, the consequences are severe.

Business impact

Successful exploitation could allow attackers to achieve remote code execution on user systems running vulnerable Chrome versions. This poses significant risk to organizations where Chrome is the primary browser, particularly for users accessing untrusted networks or visiting adversary-controlled infrastructure. Attackers could potentially exfiltrate sensitive data, modify web content in transit, or establish persistent footholds. For enterprises, the combination of remote exploitability and lack of user interaction requirements elevates the incident response burden and widens the attack surface.

Affected systems

Google Chrome versions prior to 150.0.7871.47 are directly affected. The vulnerability also impacts Chrome running on Windows, macOS, and Linux platforms. While the CVE lists operating system vendors, the vulnerability itself is within the Chrome QUIC implementation; patching Chrome addresses the root cause across all platforms.

Exploitability

The vulnerability is remotely exploitable without requiring user interaction or elevated privileges, making it broadly dangerous. However, the CVSS complexity factor (High) suggests that successful exploitation requires specific network conditions or timing. The vulnerability has not been added to the CISA Known Exploited Vulnerabilities (KEV) catalog, indicating no publicly documented active exploitation has been confirmed at the time of publication, though this should not be interpreted as low risk given the severity and attack profile.

Remediation

Immediately update Google Chrome to version 150.0.7871.47 or later. This version contains the patch addressing the use-after-free condition in the QUIC stack. Users relying on Chrome auto-update will receive the patch automatically, though administrators should verify deployment in managed environments. For organizations with update constraints, consider restricting network access or disabling HTTP/3 if supported by network infrastructure until patching is completed.

Patch guidance

Deploy Chrome 150.0.7871.47 or newer as soon as feasible. For enterprise environments using Chrome Enterprise, verify the update deployment status in your management console. Chrome's auto-update mechanism typically delivers patches within days of release; manual updates can be forced through enterprise policies or by visiting chrome://settings/help. Test the update in a non-production environment if your organization mandates pre-deployment validation. No interim workarounds are known; patching is the primary remediation.

Detection guidance

Monitor for unexpected Chrome crashes or memory-corruption-related exceptions in system logs, which may indicate exploitation attempts. Network-level detection is challenging because QUIC traffic is encrypted end-to-end, but organizations can log QUIC handshake anomalies or connections to untrusted external networks. Ensure endpoint detection and response (EDR) tools are configured to alert on heap corruption or unexpected code execution in Chrome processes. Track Chrome version inventory to confirm all systems have been updated to 150.0.7871.47 or later.

Why prioritize this

This vulnerability merits immediate prioritization due to the combination of high CVSS severity (8.1), remote exploitability without user interaction, and potential for code execution. Although not yet in the KEV catalog, the attack surface is broad—any system running vulnerable Chrome versions connected to untrusted networks is at risk. Organizations should treat this as a critical update despite the moderate attack complexity factor.

Risk score, explained

The CVSS v3.1 score of 8.1 (HIGH) reflects full impact on confidentiality, integrity, and availability through remote code execution, combined with network-based attack vector. The complexity rating (High) moderates the score slightly, indicating that certain network or timing conditions must align for successful exploitation, preventing a critical (9.0+) rating. The lack of privilege or user interaction requirements keeps the score elevated despite the complexity factor.

Frequently asked questions