CVE-2026-17761 in Chrome
Summary
by MITRE • 07/30/2026
Insufficient validation of untrusted input 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 malicious network traffic. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 07/30/2026
This vulnerability represents a cross-site scripting issue that affects Google Chrome for iOS versions prior to 151.0.7922.72, falling under the category of unauthorized code execution through user interface manipulation. The flaw stems from inadequate input validation mechanisms within the browser's handling of untrusted network data, creating a pathway for remote attackers to inject malicious scripts or HTML content into the user interface. This type of vulnerability is particularly dangerous in mobile environments where users may be exposed to untrusted network traffic without proper sandboxing protections.
The technical nature of this vulnerability aligns with common weakness enumeration CWE-79 which describes improper neutralization of input during web page generation, specifically targeting cross-site scripting attacks. The issue manifests as a user interface based cross-site scripting (UXSS) vulnerability that allows attackers to manipulate the browser's rendering engine and inject malicious payloads into web pages. This vulnerability enables attackers to execute arbitrary code within the context of the victim's browsing session, potentially leading to complete session hijacking or data exfiltration.
From an operational perspective, this vulnerability poses significant risks to users of Chrome for iOS who may encounter malicious network traffic during normal browsing activities. The attack vector relies on compromised network conditions or malicious web servers that can deliver crafted payloads designed to exploit the input validation gaps. Mobile browser environments present unique challenges as they often have different security boundaries compared to desktop browsers, and the exploitation of such vulnerabilities can lead to complete compromise of user sessions through techniques that bypass traditional web application firewalls.
The impact extends beyond simple script injection as it allows for session manipulation and potential data theft through the ability to inject malicious code into the browser's rendering pipeline. Attackers could leverage this vulnerability to perform actions such as stealing authentication tokens, redirecting users to phishing sites, or executing arbitrary commands within the browser context. The medium severity classification reflects the fact that while exploitation requires specific conditions and network access, successful exploitation can lead to significant security implications for affected users.
Mitigation strategies should prioritize immediate updating of Chrome for iOS to version 151.0.7922.72 or later, which contains the necessary patches to address the input validation gaps. Organizations should also implement network monitoring solutions that can detect and block suspicious traffic patterns that may indicate attempts to exploit this vulnerability. Additionally, users should be educated about the risks of visiting untrusted websites and the importance of keeping their browsers updated. The fix typically involves implementing stricter input validation mechanisms and ensuring that all untrusted data is properly sanitized before being rendered in the browser's user interface. Security teams should monitor for any related attack patterns or indicators of compromise that may emerge from exploitation attempts targeting this specific vulnerability.