EUVD-2026-27995Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Primary rating from NVD.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Lifecycle Timeline
3DescriptionCVE.org
Insufficient policy enforcement in WebUI in Google Chrome on Linux, Mac, Windows, ChromeOS prior to 148.0.7778.96 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page. (Chromium security severity: Medium)
AnalysisAI
Insufficient policy enforcement in Chrome's WebUI on Linux, Mac, Windows, and ChromeOS prior to 148.0.7778.96 allows a remote attacker with a compromised renderer process to bypass site isolation via a crafted HTML page, potentially exposing sensitive cross-site data. The vulnerability requires user interaction (UI:R) and prior renderer compromise, limiting its standalone exploitability. Vendor-released patch available in version 148.0.7778.96.
Technical ContextAI
Site isolation is a fundamental security architecture in Chromium/Chrome that renders each website in a separate OS process to prevent cross-site data theft. WebUI is a privileged Chromium interface used for internal browser pages (settings, extensions, etc.). The vulnerability stems from insufficient policy enforcement in the WebUI component, allowing a compromised renderer process-already running untrusted content-to circumvent the isolation boundaries that normally prevent it from accessing data from other sites. This is a policy/enforcement weakness rather than a memory corruption or parsing bug. The attack requires the renderer process to have already been compromised, making this a secondary exploit in a multi-stage attack chain.
RemediationAI
Update Google Chrome to version 148.0.7778.96 or later via the auto-update mechanism (Settings > About > Check for updates) or manual installation from https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop.html. Chrome's built-in auto-update feature will deliver the patched version automatically for most users; administrators managing Chrome at scale should deploy version 148.0.7778.96 or later through their standard patch management process. No workaround exists because the vulnerability is architectural to WebUI policy enforcement, so patching is the only remediation. Note that this vulnerability requires prior renderer process compromise, so remediating underlying renderer RCE vulnerabilities (via timely patching) is equally critical to preventing exploitation of this bypass.
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Same weakness CWE-693 – Protection Mechanism Failure
View allSame technique Authentication Bypass
View allVendor StatusVendor
SUSE
Severity: MediumShare
External POC / Exploit Code
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