CVE-2026-106361 in Chrome
Summary
by MITRE • 10/07/2026
Incorrect provision of specified functionality in Mobile in Google Chrome on on iOS prior to 155.0.8059.39 allowed a remote attacker leveraging social engineering to bypass web origin policy via crafted network traffic. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 10/07/2026
The vulnerability identified as an incorrect provision of specified functionality in Google Chrome for iOS prior to version 155.0.8059.39 represents a significant deviation from expected browser behavior regarding origin isolation and policy enforcement. This flaw specifically affects the mobile iteration of the Chromium-based browser, where the engine failed to correctly restrict or validate certain network operations based on their originating context. In standard web security models, browsers enforce strict same-origin policies to prevent malicious scripts loaded from one site from accessing sensitive data associated with another site. However, in this instance, the internal logic governing how specific functionalities were provisioned allowed for a breakdown in these boundaries under particular conditions involving crafted network traffic.
The technical nature of this flaw centers on a misconfiguration or logical error within the browser's networking stack when handling requests initiated by web content. By leveraging social engineering techniques, an attacker could craft malicious network traffic that exploits this inconsistency to bypass the web origin policy. This typically involves tricking a user into interacting with a compromised website or link that triggers specific API calls or resource fetches which are then processed incorrectly by the browser engine. The result is that data intended for one origin becomes accessible to another, effectively neutralizing the security boundary designed to protect user privacy and application integrity.
From an operational impact perspective, this vulnerability enables remote attackers to perform unauthorized cross-origin requests without proper authentication checks or permission validations. This can lead to several severe consequences including session hijacking if cookies are exposed, data exfiltration of sensitive information stored in local storage or indexed databases associated with the victim's active sessions, and potentially enabling further attacks such as Cross-Site Request Forgery against web applications that rely on browser-managed credentials. The severity is classified as medium by Chromium security standards because while it requires user interaction through social engineering to initiate the exploit chain, the resulting breach of isolation can have significant implications for data confidentiality and integrity.
This vulnerability aligns with CWE-284 Improper Access Control, specifically where access control rules are not properly enforced during resource manipulation or API invocation. It also maps closely to MITRE ATT&CK technique T1059 Command and Scripting Interpreter if the bypass allows execution of scripts in a privileged context, or more broadly to data exfiltration techniques that rely on abusing legitimate browser functionality for malicious purposes. The reliance on social engineering indicates that while the technical flaw is critical, successful exploitation depends heavily on user awareness and interaction with deceptive content designed to trigger the specific network conditions required by the bug.
Mitigation strategies primarily involve immediate software updates to ensure users are running version 155.0.8059.39 or later of Google Chrome for iOS, where these logical errors in origin policy enforcement have been corrected. Organizations should enforce strict content security policies that limit allowed origins and restrict data transmission methods to reduce the attack surface even if a browser vulnerability exists. Additionally, user education regarding social engineering tactics remains crucial as this exploit vector relies on deceiving users into initiating the malicious network traffic. Regular auditing of web application configurations and implementing robust authentication mechanisms can further mitigate risks associated with potential origin bypasses until all clients are patched.