CVE-2026-113035 in Chrome
Summary
by MITRE • 10/21/2026
Out of bounds read in API in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to potentially read memory 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 an out-of-bounds read within the application programming interface of Google Chrome prior to version 156.0.8078.47 represents a critical memory safety flaw that undermines the browser's core security model. This specific defect occurs when the software fails to properly validate array indices or buffer boundaries during data processing operations, allowing an attacker to access memory locations that lie outside the intended allocation limits. Such errors are particularly dangerous in web browsers because they can be triggered by maliciously crafted content delivered through standard web protocols, effectively turning a routine browsing session into a vector for exploitation without requiring any user interaction beyond visiting a compromised website or clicking on a deceptive link.
From a technical perspective, this flaw is classified under CWE-125, which denotes an out-of-bounds read vulnerability. The root cause typically involves insufficient checks during the parsing of HTML content or JavaScript execution where memory pointers are not correctly bounded before being dereferenced. When such a condition is met, the browser may return sensitive data from adjacent memory regions to the attacker-controlled context. This behavior violates the principle of least privilege and compromises the integrity of the sandbox environment that Chrome employs to isolate web pages from the underlying operating system and other processes. The Chromium project has categorized this issue with a medium security severity rating, reflecting its potential for information disclosure while acknowledging the mitigating factors present in modern browser defenses such as ASLR and DEP.
The operational impact of exploiting this vulnerability centers on unauthorized memory access within the sandboxed environment. An attacker who successfully leverages this flaw can potentially read arbitrary memory contents from other tabs or processes that share the same renderer process, leading to a breach of cross-origin isolation policies. This could result in the exfiltration of sensitive information such as session cookies, authentication tokens, private keys, or internal application state data. While the sandbox provides significant protection against full remote code execution, bypassing these boundaries allows for sophisticated attacks that can facilitate further exploitation steps, including privilege escalation if combined with other vulnerabilities or specific browser configurations.
In terms of threat intelligence frameworks, this vulnerability aligns with ATT&CK technique T1005, which refers to Data from Local System. The attacker's objective is not necessarily immediate system compromise but rather the stealthy collection of data that can be used for subsequent attacks or espionage activities. The ability to read memory inside the sandbox effectively weakens the isolation guarantees provided by Chrome’s multi-process architecture, making it easier for adversaries to gather intelligence about user activity and credentials without triggering obvious security alerts.
To mitigate this risk, users must ensure they are running Google Chrome version 156.0.8078.47 or later, as these updates contain the necessary patches that enforce stricter bounds checking within the affected API components. Administrators should prioritize deploying these updates across all endpoints to maintain a robust security posture against web-based attacks. Additionally, enabling automatic update mechanisms can help prevent exposure to such vulnerabilities by ensuring timely installation of security fixes. Organizations may also consider implementing content security policies and restricting script execution on untrusted sites to reduce the attack surface available for triggering memory corruption bugs like this one. Regular auditing of browser configurations and adherence to industry best practices for web application development further reduces the likelihood of successful exploitation in environments where Chrome is widely deployed.