CVE-2026-11289

chromium-browser: Side-channel information leakage in Paint

Published Jun 4, 2026 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Description

Side-channel information leakage in Paint 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: Low)

Analysis

Technical impact

A flaw in the Paint component of Google Chrome prior to version 149.0.7827.53 enables a side‑channel information leak. By serving a maliciously crafted HTML page, a remote attacker can extract data from other origins that the browser processes, violating confidentiality. The weakness is classified as CWE‑1300, CWE‑203, and CWE‑205 and is considered low severity by Chromium security.

Affected Systems

Google Chrome (stable channel) releases before 149.0.7827.53 are affected. Users running these versions on any operating system are vulnerable if they open a crafted HTML page that utilizes the Paint API.

Risk and Exploitability

The EPSS score is < 1% and the vulnerability is not listed in CISA’s KEV catalog, indicating no known widespread exploitation yet. However, because the attack vector is a standard web page, any user who visits a malicious site can be impacted. The CVSS score of 6.5 indicates moderate risk beyond the previously considered low severity by Chromium security, but the knowledge that sensitive data could cross origin boundaries remains significant.

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
`[149.0.7827.53,149.0.7827.53)`	affected	generic	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Upgrade Google Chrome to version 149.0.7827.53 or later.
Configure Chrome policies to disable or restrict the Paint API for untrusted content, if policy support is available.
Apply strict Content‑Security‑Policy headers on your web pages to prevent cross‑origin data exposure.

Generated by OpenCVE AI on June 7, 2026 at 15:35 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 High

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% (0.197% 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/502239897
https://nvd.nist.gov/vuln/detail/CVE-2026-11289
https://www.cve.org/CVERecord?id=CVE-2026-11289

History

Jun 9, 2026 2:00 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: Side-channel information leakage in Paint
Weaknesses		CWE-205
References		https://nvd.nist.gov/vuln/detail/CVE-2026-11289 https://www.cve.org/CVERecord?id=CVE-2026-11289
Metrics	threat_severity `None`	threat_severity `Low`

Jun 5, 2026 9:15 PM Title updated View changes

Type	Values Removed	Values Added
Title	Side-Channel Leak in Chrome Paint Allows Cross-Origin Data Leakage via Crafted Page

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

Type	Values Removed	Values Added
Weaknesses		CWE-203
Metrics		cvssV3_1 `{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Jun 5, 2026 1:15 AM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Google Google chrome
Vendors & Products		Google Google chrome

Jun 5, 2026 1:00 AM Title updated View changes

Type	Values Removed	Values Added
Title		Side-Channel Leak in Chrome Paint Allows Cross-Origin Data Leakage via Crafted Page

Jun 4, 2026 11:45 PM Description updated. Weaknesses updated. Added references View changes

Type	Values Removed	Values Added
Description		Side-channel information leakage in Paint 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: Low)
Weaknesses		CWE-1300
References		https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop.html https://issues.chromium.org/issues/502239897