CVE-2026-113259 in Chrome
Summary
by MITRE • 10/21/2026
Use after free in Frames in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 10/21/2026
The vulnerability identified as a use-after-free flaw within the Frames component of Google Chrome prior to version 156.0.8078.47 represents a critical memory management error that compromises the integrity of the browser's sandboxing mechanisms. This type of defect occurs when a program continues to use a pointer after the memory it points to has been freed, leading to undefined behavior that can be exploited by malicious actors. In this specific instance, the flaw resides in how Chrome handles frame objects during their lifecycle management, particularly when frames are destroyed or replaced while references to them remain active within the JavaScript engine or DOM structure. An attacker could craft a specialized HTML page containing scripts designed to trigger the premature deallocation of these frame resources while maintaining valid-looking pointers to that memory space.
From a technical perspective, this vulnerability aligns with CWE-416, which classifies use-after-free errors as a significant category of software weaknesses related to improper resource management. The exploitation vector relies on the attacker's ability to control the timing and content of the freed memory region. By carefully crafting the HTML page, an adversary can ensure that after the frame object is destroyed, any subsequent access or manipulation of its former memory location allows for arbitrary code execution within the context of the browser process. This is particularly dangerous because it bypasses standard security controls intended to isolate web content from the underlying operating system and user data.
The operational impact of this vulnerability is severe due to its potential for remote code execution via a crafted webpage, which corresponds directly to ATT&CK technique T1203, or Exploitation for Client Execution. Although Chromium has classified the security severity as Medium, indicating that exploitation may require specific conditions or user interaction such as visiting a malicious site, the consequence of successful exploitation is high. A remote attacker could execute arbitrary code inside the sandboxed environment of Chrome. While modern browsers employ multiple layers of defense including ASLR and DEP, breaking out of the renderer process sandbox remains a primary goal for attackers seeking to compromise the host system completely.
Mitigation strategies primarily involve updating Google Chrome to version 156.0.8078.47 or later, where these memory management issues have been addressed through rigorous code reviews and automated fuzzing tests that detect such lifecycle errors before deployment. For organizations managing large fleets of endpoints, ensuring timely patch application is critical to maintaining a secure posture against browser-based attacks. Additionally, users should be educated on the risks of visiting untrusted websites or clicking on suspicious links, as these are common vectors for delivering crafted HTML pages designed to exploit memory corruption vulnerabilities like this one.