CVE-2026-13848: Chrome Use-After-Free in Forms (8.8 HIGH)

Technical summary

CVE-2026-13848 is a use-after-free vulnerability (CWE-416) in the Forms component of the Chromium rendering engine. The defect allows an attacker-controlled HTML page to trigger a code path where a form object is accessed after it has been freed from memory. Under specific conditions, an attacker can manipulate this state to achieve arbitrary code execution within the Chrome sandbox. The vulnerability requires user interaction (clicking through to a malicious website) but does not require special privileges or unusual browser configuration. The Chromium project rated this as High severity.

Business impact

Successful exploitation enables attackers to execute arbitrary code within a user's browser, potentially leading to theft of sensitive data (credentials, browsing history, locally stored secrets), installation of malware or browser extensions, or lateral movement into corporate networks. Organizations with high user populations browsing the web—especially those handling sensitive information—face elevated risk. An attacker could harvest credentials from websites users visit, intercept or modify web traffic, or use the compromised browser as a pivot point for further attacks. Users on critical systems (developers, administrators, finance) are particularly valuable targets.

Affected systems

Google Chrome browser versions prior to 150.0.7871.47 are vulnerable across all major operating systems: Windows, macOS, and Linux. Any user or system running an unpatched version of Chrome is at risk. This includes Chrome running on corporate desktops, laptops, servers (where applicable), and potentially containerized or virtualized environments. Chromium-based browsers derived from the same codebase (Edge, Brave, Opera, Vivaldi) may also be affected depending on their sync cadence with upstream Chromium; verify with those vendors separately.

Exploitability

This vulnerability has a relatively low barrier to exploitation. It requires only a user to visit a malicious website—no drive-by downloads, no browser extensions, no advanced social engineering. The attacker controls the HTML and can craft the exact form input sequences needed to trigger the flaw. However, the vulnerability is not currently listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, which typically reflects active, weaponized exploits in the wild. Nevertheless, the high CVSS score (8.8) and the simplicity of the attack vector suggest it will be of interest to threat actors once patches are widely deployed.

Remediation

Update Google Chrome to version 150.0.7871.47 or later immediately. Chrome's built-in auto-update mechanism will push the patch; verify in Settings > About Chrome that the latest version is installed. Organizations should confirm that security policies do not block auto-updates. For managed environments, deploy the patch via your standard Chrome update channel (Google Update, MDM, or group policy). Chromium-based browsers should be checked against their respective vendor advisories for patched versions.

Patch guidance

Google Chrome automatically checks for updates and will prompt users to restart the browser to apply the patch. To manually verify: open Chrome menu > Settings > About Chrome; the browser will check for updates and display the current version number. Confirm version 150.0.7871.47 or higher is in use. In enterprise environments, leverage your device management platform (Intune, Jamf, etc.) to verify and force deployment of Chrome version 150.0.7871.47 or later across all endpoints. Test the patch in a non-production environment first to ensure compatibility with corporate extensions or web applications before organization-wide rollout.

Detection guidance

Monitor Chrome version compliance via your device inventory or MDM tool; flag machines running versions below 150.0.7871.47. Review web proxy or DNS logs for access to known malicious domains that may host exploit pages. Correlate browser crash dumps or error logs from user machines with the timeframe of exploitation attempts. If available, enable enhanced safe browsing in Chrome (Settings > Security > Safe Browsing) to help block malicious pages. Organizations with behavioral threat detection should monitor for unusual child processes spawned by the Chrome sandbox or unexpected elevated privilege requests.

Why prioritize this

This vulnerability merits immediate patching because: (1) it requires only user interaction with a website, making it broadly exploitable; (2) the CVSS score is 8.8 (HIGH), reflecting significant potential impact; (3) Chrome is ubiquitous in enterprise and consumer environments; (4) successful exploitation grants arbitrary code execution, even if sandboxed; (5) credentials, intellectual property, and malware distribution are common attack outcomes. Although not yet in the KEV catalog, the technical profile suggests active exploitation is likely in the near term.

Risk score, explained

The CVSS 3.1 vector (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) yields a score of 8.8 (HIGH). Attack Vector = Network (exploitable over the internet). Attack Complexity = Low (no special setup required). Privileges Required = None (attacker needs no prior access). User Interaction = Required (user must visit a malicious page). Scope = Unchanged (impact is limited to the vulnerable component—the browser sandbox). Confidentiality = High (full data breach within the sandbox). Integrity = High (malware installation, code injection). Availability = High (browser crash, denial of service). The high confidentiality, integrity, and availability impact across a low-barrier attack vector justifies the 8.8 rating.

Frequently asked questions