CVE-2026-10005: Chrome macOS Use-After-Free RCE Vulnerability (7.5 CVSS)

Technical summary

CVE-2026-10005 is a use-after-free memory safety issue (CWE-416) in Chrome's WebAppInstalls handler on macOS. The vulnerability allows an attacker to manipulate memory references, causing the browser to access freed memory regions during user interaction with malicious web content. Exploitation requires user-initiated UI gestures, which constrains the attack surface but does not eliminate it given the prevalence of social engineering. Google rated this High severity at the Chromium level.

Business impact

Successful exploitation grants an attacker code execution in the context of the Chrome browser process on a macOS system. This could lead to data theft from cached credentials, local file access, lateral movement within the network, or installation of persistent malware. Organizations with significant macOS user bases and reliance on web applications face elevated risk if users remain unpatched.

Affected systems

The vulnerability affects Google Chrome on Apple macOS systems running versions prior to 148.0.7778.216. macOS users on older Chrome releases are directly at risk. While the CVE entry cites both Google Chrome and Apple macOS as affected vendors, the vulnerability is specific to Chrome's implementation; the macOS platform itself does not require patching.

Exploitability

Exploitation is possible but not trivial. It requires convincing a user to visit a malicious page and perform specific UI gestures—this raises the barrier compared to passive drive-by exploits. However, the attack remains practical given that web-based social engineering campaigns regularly succeed. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog, indicating no evidence of active, widespread weaponization at the time of disclosure.

Remediation

Users and administrators should update Chrome to version 148.0.7778.216 or later on all macOS systems. For organizations, this means testing and deploying the patch across managed endpoints. Chrome's auto-update mechanism should be enabled to reduce manual deployment burden. Interim controls include blocking known malicious domains and restricting user access to untrusted websites.

Patch guidance

Deploy Chrome version 148.0.7778.216 or any subsequent release. Verify patch application by navigating to Chrome menu > About Google Chrome, which will display the installed version and confirm successful updates. Organizations using Mobile Device Management or enterprise deployment tools should use the official Chrome update channels. Test the patch in a non-production environment if your organization has custom web applications or Chrome extensions to ensure compatibility.

Detection guidance

Monitor process execution from the Chrome browser for suspicious child processes or file system modifications occurring immediately after user interaction with web content. Log and alert on unexpected memory access violations or crash dumps from the Chrome process. Endpoint Detection and Response (EDR) tools should flag attempts to execute code within the Chrome sandbox context that deviate from normal browsing behavior. Network-based detection is limited; focus should remain on endpoint telemetry.

Why prioritize this

This vulnerability merits prompt patching due to its High CVSS score (7.5), memory-safety root cause, and potential for arbitrary code execution. While exploitation requires user interaction, the barrier is not prohibitively high. The absence of active public exploitation provides a window for proactive patching before adversaries develop widely distributed attack campaigns. Organizations with security-conscious user populations and strong patch cadence should prioritize this in their next monthly cycle; those with less mature update processes should accelerate accordingly.

Risk score, explained

The CVSS 3.1 score of 7.5 (High) reflects the vulnerability's high confidentiality, integrity, and availability impact (C:H/I:H/A:H) balanced against the requirement for user interaction (UI:R) and higher attack complexity (AC:H). The score appropriately captures the practical risk: while not a network-worm vector, the potential for code execution under user control makes this a serious concern for system compromise and data exfiltration.

Frequently asked questions