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CVE-2026-17740 describes an uninitialized use vulnerability within ANGLE, the graphics library component integral to Google Chrome’s rendering pipeline. ANGLE serves as a translation layer that enables Chrome to render graphics content efficiently across different operating systems and hardware configurations. The flaw existed in Chrome versions prior to 151.0.7922.72.
The technical nature of this vulnerability stems from improper initialization of variables within ANGLE’s codebase, creating conditions where memory locations might contain unpredictable values when accessed during graphics processing operations. When a malicious actor crafts a specially designed HTML page containing specific graphical elements and WebGL commands, the uninitialized variables can trigger unexpected behavior in the graphics rendering pipeline. This misbehavior potentially allows for information disclosure through side-channel attacks where cross-origin data becomes accessible to unauthorized parties.
The attack vector requires only a crafted webpage that leverages WebGL capabilities and graphics rendering features that utilize the affected ANGLE components. Users could be exposed to data exfiltration from different origins when visiting malicious websites, potentially compromising sensitive information from other domains or applications running in the same browser context. Successful exploitation requires user interaction by the victim, as the attacker must lure the user to visit a malicious HTML page.
The vulnerability aligns with CWE-457 (Use of Uninitialized Variable) and demonstrates how fundamental programming errors can manifest in complex systems like modern web browsers. The Chromium security team rated this vulnerability as Medium severity, though the remote nature of the attack makes it particularly concerning for widespread deployment scenarios. The exploitation is known to be easy, requires no authentication, and can be launched remotely. Security mitigations primarily involve updating to Chrome version 151.0.7922.72 or later.
DailyCVE Form:
Platform: ……. Google Chrome
Version: …….. prior to 151.0.7922.72
Vulnerability :…… Uninitialized Use in ANGLE
Severity: ……. Medium (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N)
date: ………. 07/29/2026
Prediction: ……. 07/31/2026
What Undercode Say:
Analytics from the VulDB Cyber Threat Intelligence team indicate a CTI Interest Score of 1.36 with an estimated exploit price range of approximately USD $5,000-$25,000. The vulnerability is tracked in Bugzilla 2508895. The following bash commands can be used to check Chrome version and update:
Check current Google Chrome version google-chrome --version On Debian/Ubuntu, update Chrome via package manager sudo apt update && sudo apt upgrade google-chrome-stable On RHEL/CentOS/Fedora sudo dnf update google-chrome-stable Verify update was applied google-chrome --version | grep -E "151.[0-9]+.[0-9]+.[0-9]+"
The following JavaScript snippet demonstrates the conceptual attack vector involving WebGL context creation that could trigger uninitialized variable access:
// PoC concept - crafted HTML page to trigger ANGLE uninitialized use
const canvas = document.createElement('canvas');
const gl = canvas.getContext('webgl') || canvas.getContext('experimental-webgl');
// Sequence of WebGL operations designed to trigger uninitialized memory access
const buffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, buffer);
const data = new Float32Array([1.0, 2.0, 3.0, 4.0]);
gl.bufferData(gl.ARRAY_BUFFER, data, gl.STATIC_DRAW);
// Intentionally malformed shader to induce uninitialized variable usage
const vertexShaderSource = <code>attribute vec3 a_position;
varying vec3 v_color;
void main() {
vec3 uninitialized; // Uninitialized variable
gl_Position = vec4(a_position, 1.0);
v_color = uninitialized; // Use of uninitialized variable
}</code>;
// Further WebGL calls would follow to complete the exploitation chain
Exploit:
The exploitation of this vulnerability involves a remote attacker crafting a malicious HTML page that leverages WebGL capabilities to trigger uninitialized variable access within ANGLE. No authentication is required, and the attack can be launched remotely with user interaction. The uninitialized variables can cause the graphics rendering pipeline to access memory locations containing unpredictable values, potentially including cross-origin data. Currently, there are neither technical details nor a public exploit available. The vulnerability is classified under CWE-824 (Uninitialized Pointer).
Protection:
Upgrade to Google Chrome version 151.0.7922.72 or later, which contains the necessary patches to properly initialize affected variables within ANGLE’s implementation. Organizations should prioritize this update as part of their regular patch management procedures. Additional protective measures could include implementing web application firewalls, monitoring for suspicious graphics-related requests, and maintaining awareness of similar uninitialized variable issues in other browser components. Network-level controls to monitor for unusual graphics processing patterns that might indicate exploitation attempts, as well as maintaining comprehensive logging and monitoring capabilities around browser activities, are also recommended.
Impact:
Successful exploitation allows a remote attacker to leak cross-origin data via a crafted HTML page. The operational impact extends beyond simple data leakage, as it enables remote attackers to perform cross-origin information retrieval without user consent or awareness. This could compromise sensitive information from other domains or applications running in the same browser context, potentially exposing passwords, encryption keys, or other confidential data. The vulnerability affects confidentiality, integrity, and availability.
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Sources:
Reported By: nvd.nist.gov
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