CVE-2026-19155 in Chrome
Summary
by MITRE • 08/07/2026
Use after free in Payments in Google Chrome prior to 151.0.7922.109 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 08/07/2026
This vulnerability represents a critical use-after-free condition in the payments functionality of google chrome browsers version 151.0.7922.108 and earlier. The flaw exists within the renderer process memory management system where freed memory blocks are still being accessed by subsequent operations, creating potential exploitation opportunities for remote attackers who have already compromised the browser's sandbox environment. Such vulnerabilities fall under the common weakness enumeration category of CWE-416 which specifically addresses use-after-free errors that occur when program code continues to reference memory after it has been freed.
The security implications are severe as this vulnerability enables a remote attacker who has already gained access to the renderer process to potentially escape the sandbox protection mechanisms that normally isolate browser components from the underlying operating system. This represents a significant escalation of privileges that could allow attackers to execute arbitrary code with the same privileges as the browser process, potentially leading to full system compromise. The chromium security severity classification of high reflects the dangerous nature of this vulnerability and its potential impact on user security.
The exploitation mechanism involves crafting a malicious html page that triggers the specific memory management flaw within the payments handling code path. When the renderer processes this crafted content, it causes the use-after-free condition to manifest, potentially allowing an attacker to control memory layout or inject malicious code into the browser's memory space. This type of vulnerability is particularly dangerous because it operates within the browser's security boundaries and requires sophisticated exploitation techniques to achieve sandbox escape.
The operational impact extends beyond simple privilege escalation as this vulnerability could enable attackers to access sensitive user data, perform unauthorized transactions through payment systems, or gain persistent access to compromised systems. The vulnerability affects all users running affected chrome versions regardless of their security awareness level since the attack vector is through web content that can be delivered via malicious websites, email attachments, or compromised web applications.
Mitigation strategies should focus on immediate patching of affected chrome versions to 151.0.7922.109 or later where the use-after-free condition has been addressed through proper memory management controls and additional bounds checking mechanisms. Organizations should also implement network-based protections such as content filtering systems that can block known malicious web content and enforce strict browser security policies including sandbox enforcement, privilege separation, and regular security updates. Additionally, users should be educated about avoiding suspicious websites and maintaining updated browser versions to minimize exposure to such vulnerabilities.
This vulnerability aligns with several attack patterns described in the mitre att&ck framework particularly under initial access and privilege escalation tactics where attackers leverage software vulnerabilities to gain unauthorized access to systems. The use-after-free nature of this flaw makes it a common target for exploit development as demonstrated by various exploit kits that have historically used similar memory corruption vulnerabilities to achieve code execution within browser environments. Security professionals should monitor for indicators of compromise related to this specific vulnerability and ensure proper patch management procedures are in place to prevent exploitation attempts.