EUVD-2026-27997Severity by source
AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
3DescriptionCVE.org
Insufficient validation of untrusted input in Network in Google Chrome prior to 148.0.7778.96 allowed a remote attacker who had compromised the renderer process to perform UI spoofing via a crafted HTML page. (Chromium security severity: Medium)
AnalysisAI
UI spoofing via insufficient input validation in Google Chrome prior to 148.0.7778.96 allows a remote attacker who has already compromised the renderer process to craft malicious HTML pages that deceive users about the legitimate UI elements. The attack requires renderer process compromise as a prerequisite and user interaction with the crafted page, limiting real-world applicability to multi-stage attacks. Chromium assessed this as medium severity; no public exploit code or active exploitation has been identified.
Technical ContextAI
The vulnerability resides in Chrome's Network component (per Chromium classification) and involves CWE-20 (Improper Input Validation), specifically insufficient sanitization of untrusted HTML input before rendering UI elements. The attack surface requires the renderer process to be already compromised, meaning this is a post-exploitation vector rather than a primary attack vector. The renderer process, which executes web content in a sandboxed context, fails to properly validate crafted HTML constructs that can visually mimic browser UI, potentially spoofing address bars, security indicators, or other trust signals. This is a classic UI redressing/clickjacking variant operating within an already-compromised process boundary.
RemediationAI
Update Google Chrome to version 148.0.7778.96 or later immediately via Settings > About Chrome, which will automatically download and apply the patch (a browser restart may be required). For enterprise deployments, push version 148.0.7778.96+ via your managed deployment tool (Chrome Enterprise, Intune, etc.). No workarounds are available for unpatched versions since the vulnerability operates at the renderer level; reliance on extensions or policy settings cannot mitigate UI spoofing after renderer compromise. The primary mitigation is patch deployment; secondary defenses (Content Security Policy, restrictive JavaScript policies) do not address this specific vector once the renderer is compromised.
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Same weakness CWE-20 – Improper Input Validation
View allSame technique Information Disclosure
View allVendor StatusVendor
SUSE
Severity: MediumShare
External POC / Exploit Code
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