EUVD-2026-34647
GHSA-gxqp-qgph-629x
Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Primary rating from NVD.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Lifecycle Timeline
4DescriptionCVE.org
Inappropriate implementation in CSS in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to inject arbitrary scripts or HTML (UXSS) via a crafted HTML page. (Chromium security severity: Medium)
AnalysisAI
Universal Cross-Site Scripting (UXSS) in Google Chrome's CSS implementation prior to version 149.0.7827.53 allows remote unauthenticated attackers to inject arbitrary scripts or HTML across origin boundaries via a crafted HTML page, requiring only user interaction. The Scope:Changed CVSS component (S:C) confirms this bypasses Chrome's Same-Origin Policy, enabling access to content from other origins in the victim's browser session. No public exploit code has been identified at time of analysis, and this is not listed in CISA KEV; however, UXSS classes in major browsers are historically targeted by threat actors for session hijacking and credential theft.
Technical ContextAI
The vulnerability resides in Chrome's CSS engine implementation, classified under CWE-79 (Improper Neutralization of Input During Web Page Generation - Cross-site Scripting). Unlike conventional reflected or stored XSS, this is a UXSS (Universal XSS) class flaw, meaning the injection is not constrained to a single origin but can escape browser isolation primitives and affect content from other loaded origins. The root cause is an 'inappropriate implementation' in how Chrome processes or renders CSS constructs, allowing attacker-controlled input to be interpreted as executable script or HTML markup. The CVSS Changed Scope indicator (S:C) and the CWE-79 classification together confirm cross-origin impact beyond the attacker's own web context. Affected product per EUVD data: Google Chrome all versions prior to 149.0.7827.53.
RemediationAI
Vendor-released patch: Google Chrome 149.0.7827.53. Users and administrators should update immediately via Chrome's built-in update mechanism (Settings → Help → About Google Chrome) or through enterprise deployment tools (Google Update, Intune, JAMF). The fix is confirmed available per the stable channel update advisory at http://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop.html. For environments where immediate patching is not feasible, a compensating control is to restrict or block access to untrusted external web content using web proxy category filtering, which reduces exposure to attacker-controlled crafted HTML pages - note this does not eliminate risk from compromised legitimate sites. Organizations using Chrome via Chromium-based products (Edge, Brave, etc.) should verify whether their respective vendors have issued corresponding updates, as the upstream fix is in the Chromium codebase (tracked at issues.chromium.org/issues/502805170).
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Same weakness CWE-79 – Cross-site Scripting (XSS)
View allVendor StatusVendor
SUSE
Severity: Medium| Product | Status |
|---|---|
| openSUSE Tumbleweed | Fixed |
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External POC / Exploit Code
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