CVE-2026-79192 in Chrome
Summary
by MITRE • 08/26/2026
Improper input validation in Variations in Google Chrome prior to 152.0.7977.65 allowed a remote attacker to potentially bypass web origin policy via crafted network traffic. (Chromium security severity: Medium)
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 08/26/2026
The vulnerability identified as an improper input validation flaw within the Chromium engine, specifically affecting Google Chrome versions prior to 152.0.7977.65, represents a significant deviation from expected secure coding practices regarding network traffic handling. This defect allows for the potential bypass of web origin policies through the manipulation of crafted network packets or responses. Web origin policies are fundamental security mechanisms in modern browsers that restrict how documents or scripts loaded from one origin can interact with resources from another origin. By failing to adequately validate inputs associated with these network interactions, the browser inadvertently permits malicious actors to exploit inconsistencies in how cross-origin requests and responses are processed, thereby undermining the isolation guarantees provided by the same-origin policy.
From a technical perspective, this vulnerability falls under the category of CWE-20 Improper Input Validation within the Common Weakness Enumeration framework. The core issue lies in the browser's failure to rigorously check or sanitize data received during network operations before it is applied to security boundaries such as origin checks. When an attacker crafts specific network traffic that exploits these validation gaps, they can trick the browser into treating a malicious resource as if it originated from a trusted domain. This misclassification enables scripts running in the context of the legitimate site to access sensitive data or perform actions on behalf of the user without proper authorization, effectively neutralizing the protective barriers designed to prevent cross-site scripting and unauthorized data exfiltration.
The operational impact of this vulnerability is classified as medium severity within the Chromium security model, yet its real-world implications can be severe depending on the target environment. Successful exploitation allows a remote attacker to bypass web origin policies, which facilitates actions such as stealing session cookies, reading sensitive content from other tabs or windows, and performing unauthorized state changes on behalf of the victim. This capability directly align with ATT&CK technique T1530 Data from Local System, specifically sub-techniques related to data staging via browser-based exfiltration. Attackers can leverage this flaw in phishing campaigns where a user is tricked into visiting a malicious site that sends crafted requests to a vulnerable target application hosted on a different domain but served through the same compromised or misconfigured infrastructure, thereby escalating privileges and gaining unauthorized access to protected resources.
Mitigation strategies for this vulnerability primarily involve immediate software updates to ensure all client systems are running Google Chrome version 152.0.7977.65 or later, where these input validation checks have been corrected by the Chromium development team. In environments where patching is not immediately feasible, network-level controls such as strict Content Security Policy headers can help mitigate some of the risks associated with origin bypasses by restricting which sources are allowed to load resources and execute scripts. Additionally, implementing robust Web Application Firewalls that inspect incoming traffic for anomalous patterns consistent with crafted requests may provide an additional layer of defense against exploitation attempts targeting this specific input validation weakness.