CVE-2026-13844 Overview
CVE-2026-13844 is a use-after-free vulnerability [CWE-416] in the Updater component of Google Chrome on Windows. Versions prior to 150.0.7871.47 are affected. A local attacker can leverage a malicious file to trigger the flaw and achieve operating system-level privilege escalation. Google classifies the Chromium security severity as High, and the CVSS 3.1 base score is 7.8.
The Chrome Updater runs with elevated privileges on Windows to install browser updates. Exploiting the use-after-free condition in this service allows an attacker with local access to execute code in the context of a privileged process, breaking out of the standard user boundary.
Critical Impact
Successful exploitation yields OS-level privilege escalation on Windows endpoints running vulnerable Chrome builds, giving attackers a path from user-level access to SYSTEM-level control.
Affected Products
- Google Chrome on Windows prior to 150.0.7871.47
- Microsoft Windows hosts running affected Chrome builds
- Chromium-derived browsers that bundle the vulnerable Updater component
Discovery Timeline
- 2026-06-30 - CVE-2026-13844 published to NVD
- 2026-07-02 - Last updated in NVD database
Technical Details for CVE-2026-13844
Vulnerability Analysis
The flaw resides in the Chrome Updater on Windows, which is responsible for maintaining and installing browser updates under a privileged service context. A use-after-free condition arises when the Updater continues to reference a memory object after that object has been released. An attacker who can place a malicious file in a location processed by the Updater can influence the freed object, causing the Updater to operate on attacker-controlled data.
Because exploitation requires local access and user interaction (as reflected in the CVSS vector), the primary abuse scenario is a local, low-privileged user or a secondary payload delivered through phishing or a prior compromise. The confidentiality, integrity, and availability impacts are all rated High, consistent with full compromise of the host through privilege escalation.
Root Cause
The root cause is improper lifetime management of a heap object inside the Chrome Updater on Windows. The component frees the object but retains a dangling reference. Subsequent operations dereference this stale pointer, allowing attacker-supplied data placed via a malicious file to be interpreted as a valid object. This corresponds to CWE-416: Use After Free.
Attack Vector
Exploitation requires local access to the target Windows host. An attacker drops a specially crafted file into a path the privileged Updater processes and then triggers or waits for the Updater workflow. When the Updater accesses the freed object, attacker-controlled memory is used, resulting in code execution within the privileged Updater context and OS-level privilege escalation.
No public proof-of-concept exploit is available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. See the Chromium Issue Tracker Entry for the upstream reference.
Detection Methods for CVE-2026-13844
Indicators of Compromise
- Unexpected child processes spawned by GoogleUpdate.exe or updater.exe outside of scheduled update windows.
- Creation or modification of files in the Google Update installation directory by non-privileged user accounts.
- Crashes or abnormal terminations of the Chrome Updater service logged in the Windows Application event log.
Detection Strategies
- Monitor endpoints for Chrome versions below 150.0.7871.47 using software inventory tools and flag them for remediation.
- Correlate local file-write events in Updater-controlled paths with subsequent elevated process launches to surface privilege escalation attempts.
- Alert on integrity or signature mismatches on binaries and support files loaded by the Chrome Updater service.
Monitoring Recommendations
- Track Windows event IDs related to service crashes and unexpected restarts for Google Update services.
- Baseline normal Updater behavior on a representative host, then alert on deviations such as unusual command lines or child processes.
- Ingest Chrome Updater and Windows security telemetry into a centralized analytics platform for cross-host correlation.
How to Mitigate CVE-2026-13844
Immediate Actions Required
- Update Google Chrome on all Windows endpoints to version 150.0.7871.47 or later using enterprise deployment tooling.
- Verify that Chrome auto-update is enabled and functioning; audit endpoints where update policy is disabled or broken.
- Restrict local logon rights on sensitive Windows hosts to limit which users can stage malicious files for local exploitation.
Patch Information
Google addressed CVE-2026-13844 in Chrome 150.0.7871.47 on the Stable channel for Windows. Refer to the Google Chrome Desktop Update announcement for the full advisory and channel details. Administrators managing Chrome via group policy or Chrome Browser Cloud Management should confirm rollout status across the fleet.
Workarounds
- No vendor-supplied workaround exists; patching to 150.0.7871.47 or later is the authoritative fix.
- Where immediate patching is not possible, tighten filesystem permissions on directories used by the Chrome Updater to block writes from standard user accounts.
- Apply application allowlisting to prevent execution of unauthorized files from user-writable locations that could be leveraged during exploitation.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
