CVE-2026-7974 in Chrome
Summary
by MITRE • 05/06/2026
Use after free in Blink in Google Chrome prior to 148.0.7778.96 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 05/17/2026
This vulnerability represents a critical use-after-free flaw in the Blink rendering engine component of Google Chrome browsers prior to version 148.0.7778.96. The issue stems from improper memory management where freed memory blocks are accessed after being deallocated, creating a predictable exploitation vector for remote attackers. The vulnerability is classified under the Common Weakness Enumeration framework as CWE-416, which specifically addresses the use of freed memory condition that occurs when a program continues to reference memory after it has been freed. This particular flaw exists within the Blink engine's handling of HTML elements and their associated memory structures, making it particularly dangerous as it can be triggered through standard web page rendering processes.
The technical exploitation of this vulnerability allows a remote attacker to execute arbitrary code within the browser's sandboxed environment through a carefully crafted HTML page. The attacker need only host a malicious webpage that triggers the specific memory management path leading to the use-after-free condition. When the browser processes this crafted content, it causes the freed memory to be reallocated and subsequently accessed in an unauthorized manner, potentially enabling code execution with the privileges of the browser process. This represents a significant escalation from typical web-based attacks, as the sandbox boundaries can be bypassed through successful exploitation of this memory corruption vulnerability. The Chromium security severity classification of Medium reflects the complexity of exploitation required, though the potential impact remains severe given the privileged execution context.
The operational impact of this vulnerability extends beyond simple remote code execution, as it fundamentally compromises the security model that browsers implement to isolate web content from the underlying operating system. When successfully exploited, the vulnerability can allow attackers to bypass the sandbox protection mechanisms that are designed to prevent malicious code from accessing sensitive system resources or performing unauthorized operations. This makes it particularly dangerous in environments where users may encounter untrusted web content, as the attack surface expands to include any web-based interaction that could trigger the vulnerable code path. The vulnerability affects all versions of Chrome prior to 148.0.7778.96, making it a widespread concern for organizations that have not yet updated their browser installations.
Mitigation strategies for this vulnerability primarily focus on immediate browser updates to the patched versions, which contain memory management fixes that prevent the use-after-free condition from occurring. Organizations should implement comprehensive patch management procedures to ensure all Chrome installations are updated promptly, as the vulnerability can be exploited through simple web browsing activities without user interaction beyond visiting a malicious site. Additionally, browser security configurations can be enhanced through the implementation of additional security features such as site isolation, sandbox hardening, and content security policies that further limit the potential impact of such exploits. Network-level protections including web application firewalls and intrusion detection systems can provide additional layers of defense, though they cannot fully compensate for the fundamental memory corruption issue that requires code-level fixes. Security teams should also monitor for exploitation attempts through network traffic analysis and implement proper incident response procedures to address potential breaches. The vulnerability demonstrates the critical importance of maintaining up-to-date software and the inherent risks associated with complex browser rendering engines that handle untrusted input from multiple sources.