CVE-2026-14003 - Vulnerability Details

Description

Insufficient policy enforcement in Extensions in Google Chrome prior to 150.0.7871.47 allowed an attacker who convinced a user to install a malicious extension to leak cross-origin data via a crafted Chrome Extension. (Chromium security severity: Medium)

Published: 2026-06-30

Score: 4.3 Medium

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Impact

Google Chrome extensions lacked proper policy enforcement in versions prior to 150.0.7871.47, allowing a malicious extension to read data from web origins outside its own domain. This flaw permits cross‑origin data leakage but does not grant code execution or system compromise. The weakness corresponds to Improper Authorization (CWE-284).

Affected Systems

The vulnerability affects all installations of Google Chrome versions earlier than 150.0.7871.47, regardless of operating system. Users running these versions remain exposed until upgraded.

Risk and Exploitability

The CVSS score of 4.3 indicates medium severity, while the EPSS score of less than 1% suggests a low likelihood of exploitation. The flaw is not listed in the CISA KEV catalog. Based on the description, it is inferred that the attacker must first convince a user to install a malicious Chrome extension, typically through social engineering.

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
`150.0.7871.47`	affected	< 150.0.7871.47

No data.

Vendor Product Confidence Versions

Google

Chrome

100%

Version	Status	Scheme	Platform
`[0,150.0.7871.47)`	affected	generic	—

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Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

Upgrade Chrome to version 150.0.7871.47 or newer to address the policy enforcement flaw.
Remove any installed extensions that are unnecessary or that request permissions beyond their intended functionality.
Verify the source and permissions of extensions before installing, ensuring they adhere to the principle of least privilege.

Generated by OpenCVE AI on August 2, 2026 at 00:21 UTC.

Tracking

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Advisories

Source	ID	Title
Debian DLA	DLA-4672-1	chromium security update
Debian DSA	DSA-6378-1	chromium security update

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.

The EPSS score is 0.00148.

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_0175352312.html
https://issues.chromium.org/issues/514503077

History

Sun, 02 Aug 2026 00:45:00 +0000

Type	Values Removed	Values Added
Title	Insufficient Policy Enforcement in Chrome Extensions Enables Cross‑Origin Data Leakage

Mon, 27 Jul 2026 03:00:00 +0000

Type	Values Removed	Values Added
Title		Insufficient Policy Enforcement in Chrome Extensions Enables Cross‑Origin Data Leakage

Wed, 22 Jul 2026 15:30:00 +0000

Type	Values Removed	Values Added
Title	Cross‑Origin Data Leakage via Malicious Chrome Extension

Fri, 17 Jul 2026 02:45:00 +0000

Type	Values Removed	Values Added
Title		Cross‑Origin Data Leakage via Malicious Chrome Extension

Tue, 14 Jul 2026 11:45:00 +0000

Type	Values Removed	Values Added
Title	Chrome Extension Policy Enforcement Flaw Leading to Cross‑Origin Data Leakage

Mon, 13 Jul 2026 05:15:00 +0000

Type	Values Removed	Values Added
Title		Chrome Extension Policy Enforcement Flaw Leading to Cross‑Origin Data Leakage

Sat, 11 Jul 2026 02:45:00 +0000

Type	Values Removed	Values Added
Title	Insufficient Extension Policy Enables Cross‑Origin Data Leakage in Chrome

Fri, 10 Jul 2026 04:15:00 +0000

Type	Values Removed	Values Added
Title		Insufficient Extension Policy Enables Cross‑Origin Data Leakage in Chrome

Thu, 09 Jul 2026 03:00:00 +0000

Type	Values Removed	Values Added
Title	Chrome Extension Policy Enforcement Weakness

Wed, 08 Jul 2026 03:30:00 +0000

Type	Values Removed	Values Added
Title		Chrome Extension Policy Enforcement Weakness

Mon, 06 Jul 2026 20:45:00 +0000

Type	Values Removed	Values Added
Title	Insufficient Policy Enforcement in Chrome Extensions Enables Cross‑Origin Data Leakage

Mon, 06 Jul 2026 03:45:00 +0000

Type	Values Removed	Values Added
Title		Insufficient Policy Enforcement in Chrome Extensions Enables Cross‑Origin Data Leakage

Sun, 05 Jul 2026 15:00:00 +0000

Type	Values Removed	Values Added
Title	Chrome Extension Policy Enforcement Allows Cross‑Origin Data Leakage

Sat, 04 Jul 2026 23:15:00 +0000

Type	Values Removed	Values Added
Title		Chrome Extension Policy Enforcement Allows Cross‑Origin Data Leakage

Sat, 04 Jul 2026 07:45:00 +0000

Type	Values Removed	Values Added
Title	Chrome Extension Policy Flaw Allows Cross‑Origin Data Leakage

Fri, 03 Jul 2026 12:30:00 +0000

Type	Values Removed	Values Added
Title		Chrome Extension Policy Flaw Allows Cross‑Origin Data Leakage

Fri, 03 Jul 2026 02:30:00 +0000

Type	Values Removed	Values Added
Title	Chrome Extension Policy Bypass Enables Cross‑Origin Data Leakage

Thu, 02 Jul 2026 17:15:00 +0000

Type	Values Removed	Values Added
Title		Chrome Extension Policy Bypass Enables Cross‑Origin Data Leakage

Thu, 02 Jul 2026 06:45:00 +0000

Type	Values Removed	Values Added
Title	Insufficient Extension Policy Enforcement Enables Cross-Origin Data Leakage

Thu, 02 Jul 2026 02:15:00 +0000

Type	Values Removed	Values Added
Title		Insufficient Extension Policy Enforcement Enables Cross-Origin Data Leakage

Wed, 01 Jul 2026 18:00:00 +0000

Type	Values Removed	Values Added
Title	Insufficient Extension Policy Enforcement Leading to Cross‑Origin Data Leakage in Google Chrome
Weaknesses	CWE-200 CWE-285

Wed, 01 Jul 2026 16:30:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-284
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'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Wed, 01 Jul 2026 10:30:00 +0000

Type	Values Removed	Values Added
Title		Insufficient Extension Policy Enforcement Leading to Cross‑Origin Data Leakage in Google Chrome
Weaknesses		CWE-200 CWE-285

Wed, 01 Jul 2026 07:45:00 +0000

Type	Values Removed	Values Added
Title	Insufficient Extension Policy Enforcement Leading to Cross‑Origin Data Leak
Weaknesses	CWE-284 CWE-693

Wed, 01 Jul 2026 07:15:00 +0000

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

Wed, 01 Jul 2026 02:45:00 +0000

Type	Values Removed	Values Added
Title		Insufficient Extension Policy Enforcement Leading to Cross‑Origin Data Leak
Weaknesses		CWE-284 CWE-693

Tue, 30 Jun 2026 23:15:00 +0000

Type	Values Removed	Values Added
Description		Insufficient policy enforcement in Extensions in Google Chrome prior to 150.0.7871.47 allowed an attacker who convinced a user to install a malicious extension to leak cross-origin data via a crafted Chrome Extension. (Chromium security severity: Medium)
References		https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_0175352312.html https://issues.chromium.org/issues/514503077

Subscriptions

Google Chrome

MITRE

Status: PUBLISHED

Assigner: Chrome

Published: 2026-06-30T22:38:52.341Z

Updated: 2026-07-01T16:05:38.350Z

Reserved: 2026-06-29T23:04:15.545Z

Link: CVE-2026-14003

Vulnrichment

Updated: 2026-07-01T14:47:34.014Z

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-08-02T00:30:03Z

Weaknesses

CWE-284
Improper Access Control

Impact

Affected Systems

Risk and Exploitability

Tracking

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction Required

Exploitation none

Automatable no

Technical Impact partial

Subscriptions

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