CVE-2026-79090 in Chrome
Summary
by MITRE • 08/26/2026
Improper privilege management in Actor in Google Chrome prior to 152.0.7977.65 allowed a remote attacker leveraging social engineering to bypass system access restrictions via a crafted HTML page. (Chromium security severity: Low)
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Analysis
by VulDB Data Team • 08/26/2026
The vulnerability identified as an improper privilege management flaw within the Chromium-based Google Chrome browser, specifically affecting versions prior to 152.0.7977.65, represents a significant risk related to access control mechanisms in web contexts. This issue stems from how the browser handles permissions and security boundaries when processing content loaded via HTML pages. The core technical flaw involves an inadequacy in enforcing strict separation between privileged operations and untrusted user input or remote code execution attempts. When a victim is directed to a maliciously crafted HTML page, the application fails to correctly validate whether the requested actions should be permitted under current security policies. This lapse allows the attacker to perform operations that are typically restricted by default browser sandboxing rules, effectively bypassing system access restrictions designed to protect user data and system integrity from unauthorized modification or exfiltration.
From a technical perspective, this vulnerability aligns with CWE-269, which describes Improper Privilege Management. In the context of web browsers, privilege management is critical because it dictates what scripts can do once they are executed within the browser's environment. The flaw likely involves a logic error where certain APIs or features that require elevated privileges for safety reasons were inadvertently exposed to lower-privilege contexts without adequate checks. This could involve interactions with local file systems, network interfaces, or other sensitive system resources. Because the vulnerability is triggered by loading a crafted HTML page, it relies heavily on social engineering tactics such as phishing emails, malicious advertisements, or compromised websites that lure users into visiting specific URLs. The browser's default security model assumes that content from untrusted origins should be sandboxed, but this flaw creates an exception to that rule under specific conditions present in the affected versions.
The operational impact of this vulnerability is primarily driven by its reliance on user interaction and social engineering. While the Chromium project classified the severity as Low, indicating that exploitation may require complex setup or specific environmental conditions, the potential consequences remain serious for targeted attacks. An attacker who successfully exploits this flaw could potentially access sensitive information stored locally by the browser, such as cookies, cached data, or form history. In more severe scenarios depending on the exact nature of the bypassed restrictions, it might allow for further lateral movement within a user's system if combined with other vulnerabilities or misconfigurations. The impact is not necessarily immediate remote code execution but rather an elevation of privileges that compromises confidentiality and potentially integrity of user data. This makes it particularly dangerous in corporate environments where employees may be targeted by sophisticated phishing campaigns designed to harvest credentials or install malware through subsequent steps following the initial browser exploit.
Mitigation strategies for this vulnerability focus on both technical updates and security hygiene practices. The primary defense is to ensure that all instances of Google Chrome are updated to version 152.0.7977.65 or later, where these privilege management checks have been corrected by the Chromium development team. Organizations should enforce automatic update policies for browsers across their endpoints to minimize exposure windows. Additionally, users and security teams should remain vigilant against social engineering attempts, as this vulnerability requires a user to visit a malicious page. Implementing strict content security policies (CSP) in web applications can help mitigate some risks by restricting the sources from which scripts are loaded. Furthermore, deploying browser isolation technologies or sandboxed browsing profiles for high-risk activities can reduce the blast radius if such an exploit is attempted. Monitoring network traffic and endpoint behavior for unusual patterns associated with privilege escalation attempts can also aid in early detection of exploitation efforts targeting this specific flaw.