CVE-2026-17724 in Chrome
Summary
by MITRE • 07/30/2026
Race in Chrome for iOS in Google Chrome on iOS prior to 151.0.7922.72 allowed a remote attacker to inject arbitrary scripts or HTML (UXSS) via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 07/30/2026
This vulnerability represents a critical race condition affecting Google Chrome for iOS versions prior to 151.0.7922.72, specifically categorized under the Common Weakness Enumeration framework as CWE-362, which denotes a race condition flaw. The vulnerability stems from improper handling of concurrent operations within the browser's rendering engine, creating a window where malicious actors can exploit timing discrepancies to execute unauthorized code. The issue manifests as a cross-site scripting vulnerability that allows remote attackers to inject arbitrary scripts or HTML content through carefully crafted web pages.
The technical exploitation occurs when the browser processes multiple simultaneous requests or operations without proper synchronization mechanisms. In this scenario, an attacker can construct a malicious HTML page that triggers specific timing conditions during page rendering, enabling them to bypass security restrictions and inject malicious code into the victim's browsing context. This creates a persistent threat where even legitimate websites could become vectors for malicious payload delivery.
The operational impact of this vulnerability extends beyond simple script injection, as it enables attackers to perform unauthorized actions within the context of the user's browser session. The high severity classification (Chromium security severity: High) reflects the potential for significant damage including credential theft, session hijacking, and data exfiltration. Attackers can leverage this vulnerability to execute commands that would normally be restricted by the browser's security model, effectively undermining the isolation between different web contexts.
This particular vulnerability aligns with ATT&CK framework technique T1059.001 for command and scripting interpreter execution, as well as T1566 for credential access through social engineering. The UXSS (User eXecution Scripting) nature of the flaw means that victims need only visit a compromised webpage to be affected, making it particularly dangerous in phishing campaigns or when users browse untrusted websites.
Mitigation strategies should prioritize immediate patching of Chrome for iOS to version 151.0.7922.72 or later, as this resolves the underlying race condition through proper synchronization mechanisms and improved request handling. Organizations should implement network-level protections including web application firewalls that can detect and block known malicious patterns associated with such exploits. Browser hardening measures including disabling unnecessary JavaScript features and implementing strict content security policies can provide additional defense-in-depth layers. Security monitoring should focus on detecting anomalous browser behavior patterns that might indicate exploitation attempts, particularly around timing-based attacks and unusual code injection patterns within web browsing contexts.