CVE-2026-106245 in Chrome
Summary
by MITRE • 10/06/2026
Uninitialized resource in ANGLE in Google Chrome prior to 155.0.8059.39 allowed a remote attacker to obtain cross-origin data via a crafted HTML page. (Chromium security severity: High)
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 10/07/2026
The vulnerability identified as an uninitialized resource issue within the ANGLE graphics library, which is integrated into Google Chrome prior to version 155.0.8059.39, represents a significant memory safety flaw with serious implications for web application security. ANGLE serves as a critical translation layer that converts OpenGL ES calls into native platform-specific graphics APIs such as DirectX or Metal on Windows and macOS, respectively. This component is heavily utilized by the browser to render complex visual content including WebGL applications, canvas elements, and hardware-accelerated video playback. When an uninitialized resource occurs within this subsystem, it typically indicates that a memory buffer, pointer, or state variable was accessed before being properly assigned a valid value during initialization routines. In C++ based environments like Chromium, such errors often stem from logic flaws where conditional branches fail to initialize variables in all code paths, leading to the use of garbage data or stale pointers.
From a technical perspective, this flaw falls under the category of CWE-457 which describes the use of an uninitialized variable. The specific manifestation here involves cross-origin data access, suggesting that the uninitialized state allowed for a violation of the Same-Origin Policy (SOP). Normally, browsers enforce strict isolation between resources loaded from different origins to prevent malicious scripts on one site from accessing sensitive data hosted on another. However, if ANGLE fails to properly initialize security-critical structures or handles memory in an undefined manner during rendering operations triggered by crafted HTML pages, it may inadvertently expose internal state information or allow unauthorized reads of memory regions that should be isolated. This could enable a remote attacker who hosts a malicious webpage to craft specific WebGL shaders or canvas drawing commands that exploit this uninitialized state to leak data across origin boundaries.
The operational impact of this vulnerability is classified as High severity within the Chromium security framework because it directly compromises the fundamental isolation guarantees provided by modern web browsers. An attacker can leverage this flaw through social engineering tactics, such as sending a link to a specially crafted HTML page that exploits the bug when opened in an affected version of Chrome. Upon execution, the malicious script could potentially exfiltrate sensitive user data from other tabs or websites currently open in the browser session. This includes cookies, local storage contents, authentication tokens, or any dynamic content rendered via WebGL that relies on ANGLE for processing. The ability to bypass cross-origin restrictions undermines trust in web applications and can lead to account takeover, session hijacking, or further exploitation of downstream services if sensitive data is transmitted to an attacker-controlled server.
Mitigation strategies primarily involve updating the browser software immediately to a version where this issue has been resolved by Google engineers. Patching ensures that the underlying ANGLE library includes proper initialization checks and memory management corrections for the specific code paths involved in rendering operations. For organizations deploying Chrome at scale, enforcing automatic update policies is essential to minimize exposure windows. Additionally, users should exercise caution when visiting untrusted websites or opening HTML files from unknown sources until their browser software is fully updated. Security teams can also monitor network traffic and endpoint detection systems for anomalies indicative of WebGL-based exploitation attempts, although the primary defense remains timely patching of the client-side application infrastructure to eliminate the root cause in the graphics processing pipeline.