CVE-2026-106322 in Chrome
Summary
by MITRE • 10/06/2026
Open redirect in AppManifest in Google Chrome prior to 155.0.8059.39 allowed a remote attacker leveraging social engineering to bypass web origin policy via a crafted HTML page. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 10/07/2026
The vulnerability identified as an open redirect within the AppManifest component of Google Chrome prior to version 155.0.8059.39 represents a significant deviation from expected browser behavior regarding origin isolation and navigation controls. This flaw specifically affects how the browser processes manifest files associated with web applications, which are typically used to define metadata such as application name, icons, display modes, and start URLs. When an attacker crafts a malicious HTML page that leverages this component, they can manipulate the redirect logic to point users toward arbitrary external domains without proper validation of the target origin against the original context. This mechanism allows for the circumvention of web origin policies, which are fundamental security constructs designed to prevent scripts from one site from accessing resources or performing actions on another site with a different origin.
From a technical perspective, the core issue lies in insufficient input sanitization and destination validation within the AppManifest parsing logic. The browser fails to adequately verify that redirect targets specified in manifest files adhere to strict same-origin policies or allow-listed domains before executing navigation changes. This oversight creates an avenue for social engineering attacks where a victim is lured into visiting a compromised webpage containing the crafted HTML payload. Upon interaction, the malicious page triggers the vulnerable component, resulting in an immediate and seamless redirect to a phishing site or other malicious infrastructure controlled by the attacker. The medium severity rating assigned by Chromium reflects the fact that while this does not allow for direct code execution or sandbox escape on its own, it significantly lowers the barrier for subsequent attacks such as credential harvesting, session hijacking via cookie theft if secure flags are misconfigured, or further exploitation of other client-side vulnerabilities at the destination site.
The operational impact of this vulnerability is primarily centered around trust erosion and user deception. By bypassing origin policies through open redirects, attackers can create highly convincing phishing scenarios that appear to originate from legitimate sources due to the browser's address bar potentially retaining a semblance of legitimacy during intermediate steps or relying on visual cues rather than strict domain verification in certain contexts. This undermines the security model that relies on users trusting the URL displayed in their browser. Furthermore, such redirects can be used to bypass content security policies (CSP) if those policies rely on specific origin checks for script loading or form submissions, thereby facilitating cross-site scripting attacks or data exfiltration at a later stage of the attack chain.
To mitigate this risk, users are strongly advised to upgrade Google Chrome immediately to version 155.0.8059.39 or any subsequent release where these validation checks have been hardened. Web developers should also review their application manifests and ensure that they do not rely on dynamic redirect logic within manifest files for critical security boundaries. Implementing strict Content Security Policy directives can help limit the damage of such redirects by restricting script execution to trusted origins only. Additionally, employing browser extensions or built-in phishing protection features can provide an additional layer of defense against navigation to known malicious domains. From a classification standpoint, this vulnerability aligns with CWE-601, which describes URL Redirection to Untrusted Site (Open Redirect), and maps to the ATT&CK technique T1583.002 for Acquire Infrastructure: Domains, as it facilitates the setup of deceptive entry points for further exploitation efforts.