CVE-2026-11210 in Chrome
Summary
by MITRE • 06/05/2026
Inappropriate implementation in Safe Browsing in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to bypass discretionary access control via a crafted RAR file. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 06/05/2026
The vulnerability in question represents a critical weakness in Google Chrome's Safe Browsing implementation that existed prior to version 149.0.7827.53, classified as a medium severity issue by Chromium security standards. This flaw stems from an inadequate handling of discretionary access control mechanisms when processing specially crafted RAR archive files, creating a pathway for remote attackers to circumvent intended security protections. The vulnerability specifically targets the browser's content filtering and security enforcement systems that are designed to prevent users from accessing potentially harmful files through various file format parsers and handlers.
The technical implementation flaw manifests in how Chrome's Safe Browsing service processes and validates RAR file formats during download and execution scenarios. When a user encounters a maliciously crafted RAR file, the browser's access control enforcement mechanisms fail to properly validate the file's permissions and access restrictions, allowing unauthorized code execution or data access. This represents a deviation from standard security practices where file format parsers should maintain strict access control boundaries and enforce proper permission checks before allowing file operations to proceed. The vulnerability operates at the intersection of file handling security and access control enforcement, creating a gap in the browser's security architecture that malicious actors can exploit.
From an operational perspective, this vulnerability enables remote attackers to bypass security controls that are typically enforced by Chrome's Safe Browsing system, potentially allowing them to execute malicious code or access restricted system resources. The attack vector specifically involves crafting RAR files that can trick Chrome's security mechanisms into granting unauthorized access, making it particularly dangerous in environments where users may inadvertently download compromised files. The impact extends beyond simple file access violations to potentially enable more sophisticated attacks such as privilege escalation or data exfiltration, especially when combined with other vulnerabilities or attack techniques. This weakness affects all users of affected Chrome versions and demonstrates the critical importance of proper file format validation in browser security implementations.
Mitigation strategies for this vulnerability should focus on immediate patching of Chrome browsers to version 149.0.7827.53 or later, which contains the necessary security fixes to properly enforce discretionary access controls for RAR file processing. Organizations should implement additional network-level controls such as web application firewalls and content filtering systems to provide defense-in-depth protection against malicious RAR files. Security teams should also conduct regular vulnerability assessments to identify similar implementation flaws in other browser components or security systems. The fix addresses the underlying CWE category related to improper access control and ensures proper enforcement of security policies during file format processing. This vulnerability highlights the importance of maintaining up-to-date browser security implementations and following ATT&CK framework principles for defending against file-based attacks and access control bypass techniques.