CVE-2026-79269 in Chrome
Summary
by MITRE • 08/26/2026
Uninitialized resource in ANGLE in Google Chrome prior to 152.0.7977.65 allowed a remote attacker to potentially 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 within the ANGLE graphics library, which is integrated into Google Chrome prior to version 152.0.7977.65, represents a critical failure in resource initialization that undermines fundamental browser security boundaries. ANGLE serves as the translation layer between web applications and native GPU drivers, converting OpenGL ES commands into DirectX or Metal calls depending on the host operating system. When this component fails to properly initialize specific resources before they are accessed by maliciously crafted HTML pages, it creates a state where undefined memory values or uninitialized pointers may be utilized during rendering operations. This flaw is not merely a stability issue but poses a direct threat to the isolation mechanisms that prevent cross-origin data leakage and unauthorized access to protected web contexts.
From a technical perspective, this defect aligns with CWE-457, which describes the use of an uninitialized variable or resource. In the context of browser security, such initialization failures can lead to unpredictable behavior in how memory is allocated and managed during graphics processing unit operations. An attacker leveraging this vulnerability could construct a specially designed HTML page that triggers specific rendering paths within ANGLE before the necessary resources are fully initialized. By exploiting the gap between request execution and resource readiness, the attacker manipulates the browser's internal state to bypass web origin policies. This allows scripts running in one context to potentially interact with or extract data from another context, violating the same-origin policy that is central to modern web security architectures.
The operational impact of this vulnerability centers on the potential for cross-site scripting-like attacks and information disclosure through side channels enabled by graphics processing anomalies. Although classified as a medium severity issue within the Chromium project, the ability to bypass origin policies significantly elevates its risk profile in real-world scenarios. Attackers could use this flaw to steal sensitive user data such as cookies, session tokens, or form inputs from other domains that would normally be inaccessible due to browser sandboxing rules. Furthermore, improper resource handling can lead to crashes or denial of service conditions if the uninitialized state causes segmentation faults or access violations within the GPU driver stack, affecting both individual users and enterprise environments relying on stable web browsing experiences.
Mitigation strategies primarily involve immediate patching through updating Google Chrome to version 152.0.7977.65 or later, where these initialization checks have been corrected by the Chromium security team. For organizations unable to update immediately due to compatibility constraints, deploying network-level controls such as web application firewalls can help filter out suspicious traffic patterns associated with exploit attempts, although this is less effective against zero-day style rendering exploits. Additionally, enabling strict content security policies and disabling unnecessary JavaScript features in high-security environments can reduce the attack surface available to adversaries attempting to leverage uninitialized resources for origin bypasses. Continuous monitoring of browser telemetry data for unusual GPU memory usage or crash reports related to ANGLE components should also be implemented to detect potential exploitation attempts early.
This incident underscores the importance of rigorous code review practices within complex software stacks like browsers, where deep integration between high-level web standards and low-level hardware interfaces creates numerous opportunities for subtle logic errors. The ATT&CK framework categorizes such techniques under privilege escalation or defense evasion depending on how the origin bypass is utilized to access restricted resources. Security teams must remain vigilant about updates to core rendering engines since vulnerabilities in these foundational components often have broader implications than isolated application bugs, affecting all web content processed by the browser engine regardless of the specific website being visited.