CVE-2025-13026 is a security vulnerability identified in Mozilla Firefox versions earlier than 145, specifically within the Graphics: WebGPU component. The issue stems from incorrect boundary condition checks, which enable a sandbox escape. Sandboxing is a critical security mechanism that isolates browser processes to prevent malicious code from affecting the host system. By exploiting this vulnerability, an attacker can bypass these restrictions, potentially executing arbitrary code with the privileges of the user running Firefox or accessing sensitive system resources. The WebGPU API is designed to provide high-performance graphics and compute capabilities in the browser, making it a complex and sensitive component. The flaw likely arises from improper validation of memory or resource boundaries during WebGPU operations, leading to out-of-bounds access or memory corruption. Although no public exploits have been reported yet, the nature of the vulnerability suggests that exploitation could be achieved via crafted web content or malicious websites. The vulnerability affects all Firefox versions prior to 145, but the exact affected versions are unspecified. No CVSS score has been assigned yet, and no official patches or mitigation links are currently available. The vulnerability was published on November 11, 2025, indicating recent discovery and disclosure. Given the widespread use of Firefox across Europe, especially in enterprise and government environments, this vulnerability represents a significant risk vector if left unaddressed.

For European organizations, the impact of CVE-2025-13026 could be substantial. Successful exploitation could lead to sandbox escape, allowing attackers to execute arbitrary code on user machines, potentially leading to data theft, installation of persistent malware, or lateral movement within corporate networks. This is particularly critical for sectors relying heavily on web applications and browsers, such as finance, government, and critical infrastructure. The WebGPU component's involvement suggests that users engaging with graphics-intensive web applications or advanced web features are at higher risk. The breach of sandbox protections undermines one of the last lines of defense in browser security, increasing the likelihood of system compromise. Additionally, the lack of known exploits currently may lead to complacency, but the vulnerability's nature means attackers could develop exploits rapidly once details become widespread. European organizations with strict data protection regulations (e.g., GDPR) face increased compliance risks if breaches occur due to this vulnerability. The potential for widespread impact is high given Firefox's significant market share in Europe and its use in both personal and enterprise environments.

1. Immediate upgrade to Mozilla Firefox version 145 or later once the official patch is released to remediate the vulnerability. 2. Until patches are available, consider disabling the WebGPU feature via Firefox configuration settings (e.g., setting 'gfx.webrender.enabled' or related WebGPU flags to false) to reduce attack surface. 3. Employ network-level protections such as web filtering and intrusion detection systems to block access to potentially malicious websites that could exploit this vulnerability. 4. Enforce strict endpoint security policies, including application whitelisting and behavior monitoring, to detect and prevent exploitation attempts. 5. Educate users about the risks of visiting untrusted websites and opening suspicious links, as exploitation likely requires user interaction with malicious web content. 6. Monitor Mozilla security advisories and threat intelligence feeds for updates on exploit development and patch availability. 7. For high-security environments, consider sandboxing Firefox processes further using OS-level virtualization or containerization technologies to add an additional layer of isolation. 8. Conduct regular vulnerability assessments and penetration testing to identify any residual risks related to browser security.