CVE-2026-11156

chromium-browser: Inappropriate implementation in CSS

Published Jun 4, 2026 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed

Description

Inappropriate implementation in CSS in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: Medium)

Analysis

Technical impact

A flaw in Chrome's handling of CSS allowed a remote attacker to read data that should have been protected by same‑origin rules. The attack involves serving a specially crafted HTML page that exploits the CSS implementation to expose sensitive information, compromising confidentiality. This vulnerability is classified as CWE-346: Information Exposure through lack of origin‑checking, and CWE-352: Cross‑Site Request Forgery, reflecting the improper enforcement of same‑origin policies and cross‑site request dependencies.

Affected Systems

The issue affects Google Chrome browsers with versions earlier than 149.0.7827.53. Users running those releases are susceptible until a newer build is installed.

Risk and Exploitability

The EPSS score is < 1% and the vulnerability is not listed in the CISA KEV catalog, indicating no confirmed exploits yet. The only prerequisite is having a crafted HTML page run in the target browser, so the attack vector is remote via a web page. The CVSS score of 4.3 is medium; the lack of evidence of exploitation suggests current risk is moderate.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Google

Chrome

affected

Version	Status	Constraints
`149.0.7827.53`	affected	< 149.0.7827.53

Configuration 1 [-]

AND

cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*

OR	cpe:2.3:o:apple:macos:-:::::::*
	cpe:2.3:o:linux:linux_kernel:-:::::::*
	cpe:2.3:o:microsoft:windows:-:::::::*

No data.

Vendor Product Versions

Google

Chrome

Version	Status	Scheme	Platform
`[0,149.0.7827.53)`	affected	generic	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Update Chrome to version 149.0.7827.53 or newer
Apply a Content‑Security‑Policy that restricts cross‑origin CSS access, such as setting 'style-src' and 'default-src' appropriately
Apply a browser extension or group policy to sandbox or block CSS rendering for cross‑origin content until a patch is available

Generated by OpenCVE AI on June 7, 2026 at 16:01 UTC.

Tracking

Advisories

Source	ID	Title
Debian DSA	DSA-6325-1	chromium security update

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.164% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop.html
https://issues.chromium.org/issues/501810226
https://nvd.nist.gov/vuln/detail/CVE-2026-11156
https://www.cve.org/CVERecord?id=CVE-2026-11156

History

Jun 8, 2026 3:00 PM First appearance in the feed. Affected versions updated. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Apple Apple macos Linux Linux linux Kernel Microsoft Microsoft windows
CPEs		cpe:2.3:a:google:chrome:::::::: cpe:2.3:o:apple:macos:-:::::::* cpe:2.3:o:linux:linux_kernel:-:::::::* cpe:2.3:o:microsoft:windows:-:::::::*
Vendors & Products		Apple Apple macos Linux Linux linux Kernel Microsoft Microsoft windows

Jun 7, 2026 12:15 PM Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Title		chromium-browser: Inappropriate implementation in CSS
Weaknesses		CWE-346
References		https://nvd.nist.gov/vuln/detail/CVE-2026-11156 https://www.cve.org/CVERecord?id=CVE-2026-11156
Metrics	threat_severity `None`	threat_severity `Moderate`

Jun 5, 2026 8:15 PM Title updated. Weaknesses updated View changes

Type	Values Removed	Values Added
Title	Cross‑Origin Data Leak via CSS in Google Chrome
Weaknesses	CWE-1145 CWE-200

Jun 5, 2026 7:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Jun 5, 2026 6:30 PM Weaknesses updated. Scoring metrics updated View changes

Type	Values Removed	Values Added
Weaknesses		CWE-352
Metrics		cvssV3_1 `{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N'}`

Jun 5, 2026 5:15 AM Title updated. First appearance in the feed. Weaknesses updated. Affected vendors updated View changes

Type	Values Removed	Values Added
Title		Cross‑Origin Data Leak via CSS in Google Chrome
First Time appeared		Google Google chrome
Weaknesses		CWE-1145 CWE-200
Vendors & Products		Google Google chrome

Jun 4, 2026 11:15 PM Description updated. Added references View changes

Type	Values Removed	Values Added
Description		Inappropriate implementation in CSS in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: Medium)
References		https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop.html https://issues.chromium.org/issues/501810226