Google Chrome EUVD-2026-27929

Attack requires the DevTools feature to be accessible and used on Google Chrome for Android versions prior to 148.0.7778.96. The attacker must deliver a malicious file to the Android device and convince the user to open that file specifically through Chrome DevTools (UI:R - required user interaction). Exploitation does NOT require the attacker to have prior authentication to the device (PR:N), meaning physical access to an unlocked device or malware-based file placement suffices. LIMITING FACTORS: (1) DevTools is not commonly used by typical Android Chrome users - this feature is primarily utilized by web developers debugging mobile websites. (2) The file must be processed through DevTools specifically, not just opened in normal Chrome browsing. (3) The vulnerability is Android-specific and does not affect Chrome on Windows, macOS, Linux, iOS, or ChromeOS. (4) Local attack vector (AV:L) requires the attacker to have already achieved some level of device access, either physical or via prior compromise. Organizations with non-developer Android user populations face minimal risk; mobile developer teams represent the primary attack surface.

Real-world risk assessment based on available signals: CVSS 7.8 (High) reflects local attack vector (AV:L) requiring user interaction (UI:R) but no authentication (PR:N), with complete confidentiality, integrity, and availability impact. The AC:L (low complexity) indicates reliable exploitation once conditions are met. However, several factors moderate immediate risk: (1) Attack requires local access to the Android device and social engineering to convince the user to open a malicious file through DevTools - not a drive-by web attack. (2) No CISA KEV listing indicates this is not confirmed as actively exploited in the wild. (3) No public POC identified, raising the barrier for opportunistic attackers. (4) Chromium security severity rated 'High' (not Critical) by Google's own assessment aligns with targeted rather than mass-exploitation scenarios. (5) The Android-specific nature limits attack surface compared to desktop Chrome vulnerabilities. EPSS data unavailable prevents probabilistic exploitation modeling. PRIMARY RISK: Targeted attacks against high-value Android users where attacker has already achieved initial access (malware delivery, physical access, compromised file shares) and seeks privilege escalation. SECONDARY RISK: Supply chain scenarios where malicious development files are shared among Android developers using Chrome DevTools. This is NOT a critical-priority patch for general enterprise users but IS high priority for organizations with Android developer populations or high-value mobile targets.

An attacker with physical access to an unlocked Android device or remote access via malware places a specially crafted file (likely JSON, HTML, or JavaScript disguised as a legitimate web development asset) in a location accessible to the victim. Through social engineering, the attacker convinces the victim to open Chrome DevTools on Android and load the malicious file for inspection or debugging. When DevTools processes the file, insufficient policy validation allows the attacker's payload to escape the intended sandbox and execute privileged operations. The attacker achieves privilege escalation, gaining the ability to read sensitive Chrome data (passwords, cookies, browsing history), modify browser behavior, or potentially pivot to broader Android system access depending on Chrome's process privileges. No public POC exists at time of analysis, but the AC:L rating suggests reliable exploitation is achievable by skilled attackers.