CVE-2026-79237 in Chrome
Summary
by MITRE • 08/26/2026
Incorrect authorization in Navigation in Google Chrome prior to 152.0.7977.65 allowed a remote attacker to bypass web origin policy via a crafted HTML page. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 08/26/2026
The vulnerability identified as an incorrect authorization error within the navigation mechanisms of Google Chrome, specifically in versions prior to 152.0.7977.65, represents a significant breach in web origin policy enforcement. This flaw allows remote attackers to circumvent standard security boundaries that are designed to isolate content from different origins. The core technical issue lies in how the browser handles navigation events and validates the source of requests against established policies. When a user interacts with or is subjected to a crafted HTML page, the browser fails to properly verify whether the initiating context has the requisite permissions to access specific resources or navigate across origin boundaries. This lapse enables an attacker to manipulate the browsing session in ways that violate the same-origin policy, which is fundamental to web security and prevents malicious scripts on one site from accessing data on another unrelated site.
From a technical perspective, this vulnerability falls under the category of improper privilege management where the application does not enforce appropriate access controls for critical functions. The attacker crafts an HTML page containing specific code that exploits the navigation logic flaws within the Chromium engine. By triggering particular sequences or conditions during page loading or redirection, the malicious script can trick the browser into treating a cross-origin request as if it were same-origin. This effectively neutralizes one of the primary defenses against Cross-Site Scripting and data theft attacks. The severity is classified as medium by the Chromium security team because while the impact is substantial for targeted victims, it generally requires user interaction or social engineering to load the malicious page, rather than being a fully automatic remote code execution vector.
The operational impact of this vulnerability is primarily centered on privacy violations and potential data exfiltration. An attacker who successfully exploits this flaw can read sensitive information from other web applications that are open in the same browser session but reside under different domains. This includes personal user data, authentication tokens, or proprietary content hosted by third-party services. Furthermore, it allows for more sophisticated phishing attacks where an attacker can mimic legitimate sites while maintaining access to underlying resources of trusted domains. The ability to bypass origin policies undermines the trust model that web browsers provide to users and developers alike, potentially leading to account takeovers if combined with other vulnerabilities or social engineering tactics.
To mitigate this risk, organizations and individual users must ensure that Google Chrome is updated to version 152.0.7977.65 or later immediately upon availability. This patch addresses the underlying logic errors in the navigation authorization checks within the Chromium engine. For enterprise environments, it is advisable to implement automated update policies to minimize the window of exposure for all endpoints. Additionally, users should exercise caution when visiting unfamiliar websites and consider using browser extensions that enforce stricter content security policies or block potentially malicious scripts where feasible. Security teams should also monitor for indicators of compromise related to cross-origin data access attempts in web server logs and endpoint detection systems.
This vulnerability is categorized under CWE-269 which refers to Improper Privilege Management, as the system fails to restrict actions based on user roles or context permissions. In terms of attack patterns, it aligns with MITRE ATT&CK techniques related to browser exploitation and potentially Cross-Site Request Forgery if combined with other vectors. The remediation strategy focuses strictly on software patching since there are no viable workarounds within the application configuration itself that can fully mitigate a flaw in core navigation logic without impacting functionality. Maintaining up-to-date browsers is the most effective defense against such origin policy bypasses, ensuring that known security patches provided by vendors like Google are applied promptly to close these gaps in web isolation mechanisms.