CVE-2026-13861 Overview
CVE-2026-13861 is a use-after-free vulnerability [CWE-416] in the Core component of Google Chrome prior to version 150.0.7871.47. An attacker who has already compromised the renderer process can exploit the flaw to perform a sandbox escape through a crafted HTML page. The vulnerability affects Chrome across Windows, macOS, and Linux platforms. Chromium classifies the security severity as Medium, while the NVD scores it as Critical based on the impact of a successful sandbox escape.
Critical Impact
Successful exploitation allows a compromised renderer to break out of the Chrome sandbox, gaining broader access to the host operating system through a crafted HTML page.
Affected Products
- Google Chrome versions prior to 150.0.7871.47
- Chrome on Microsoft Windows
- Chrome on Apple macOS and Linux distributions
Discovery Timeline
- 2026-06-30 - CVE-2026-13861 published to NVD
- 2026-07-01 - Last updated in NVD database
Technical Details for CVE-2026-13861
Vulnerability Analysis
The flaw resides in Chrome's Core component and follows the classic use-after-free pattern. Code retains a pointer to a memory object after that object has been freed, and later operations dereference the stale pointer. When an attacker controls the allocation and reuse of that memory region, they can turn the dangling reference into a controlled read or write primitive.
Exploitation requires a two-stage attack. The adversary must first compromise the renderer process, typically through a separate memory corruption bug triggered by JavaScript, WebAssembly, or DOM manipulation. Once code executes inside the renderer sandbox, the attacker triggers the Core use-after-free to pivot into a higher-privileged Chrome process and escape the sandbox boundary.
Because the attack vector is network-based and requires only user interaction with a crafted HTML page, drive-by exploitation through malicious or compromised websites is feasible. The scope change reflected in the CVSS vector indicates the vulnerability affects components beyond the initially compromised renderer.
Root Cause
The root cause is improper object lifetime management in Chrome's Core code. An object is deallocated while another code path still holds a reference to it. Subsequent access to the freed memory allows the attacker to control the contents that the pointer references, leading to memory corruption within a privileged Chrome process.
Attack Vector
Delivery occurs through a crafted HTML page loaded in the victim's browser. The attacker chains a prior renderer compromise with this use-after-free to escape the sandbox. No authentication is required, and any user visiting a malicious page can be targeted.
No verified proof-of-concept code is publicly available. Refer to the Chromium Issue Tracker Entry for technical details as they become available.
Detection Methods for CVE-2026-13861
Indicators of Compromise
- Unexpected child processes spawned by chrome.exe or the Chrome helper processes outside the standard sandbox hierarchy.
- Chrome renderer crashes accompanied by exception codes consistent with memory corruption, such as EXCEPTION_ACCESS_VIOLATION in Windows event logs.
- Outbound connections from Chrome processes to previously unseen or low-reputation domains hosting HTML payloads.
Detection Strategies
- Inventory installed Chrome versions across the fleet and flag any host running a build older than 150.0.7871.47.
- Correlate browser crash telemetry with subsequent process creation events to identify sandbox escape attempts.
- Monitor for unusual file writes or registry modifications originating from Chrome utility or GPU processes.
Monitoring Recommendations
- Ingest browser telemetry, EDR process events, and web proxy logs into a central analytics platform for cross-source correlation.
- Alert on Chrome processes loading unsigned modules or executing shell interpreters such as cmd.exe, powershell.exe, or /bin/sh.
- Track user navigation to newly registered domains delivering HTML content with heavy JavaScript or WebAssembly payloads.
How to Mitigate CVE-2026-13861
Immediate Actions Required
- Update Google Chrome to version 150.0.7871.47 or later on all Windows, macOS, and Linux endpoints.
- Force browser restarts across managed devices to ensure the patched binary is loaded into memory.
- Verify enterprise policies enforce automatic updates through the Chrome update service or platform management tooling.
Patch Information
Google released the fix in the Chrome Stable channel update covering version 150.0.7871.47. Full release details are documented in the Google Chrome Stable Update announcement. Administrators managing Chrome through enterprise policies should confirm the update has propagated to all endpoints.
Workarounds
- Restrict browsing to trusted sites through web filtering or DNS-based controls until patching is complete.
- Deploy site isolation and strict sandbox policies to increase the cost of chaining a renderer compromise with the sandbox escape.
- Disable JavaScript on high-risk user groups where feasible, recognizing this reduces functionality across many web applications.
# Verify Chrome version on Linux endpoints
google-chrome --version
# Windows: query installed Chrome version via registry
reg query "HKLM\SOFTWARE\Google\Chrome\BLBeacon" /v version
# macOS: check installed Chrome version
defaults read /Applications/Google\ Chrome.app/Contents/Info CFBundleShortVersionString
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
