Description
Incorrect authorization in FileSystem in Google Chrome prior to 156.0.8078.47 allowed a remote attacker who had compromised the renderer process to obtain sensitive information via a crafted HTML page. (Chromium security severity: Medium)
Published: 2026-10-20
Score: 8.8 High
EPSS: < 1% Very Low
KEV: No
Impact: Information Disclosure via Chrome FileSystem
Action: Patch Now
AI Analysis

Impact

The flaw is an incorrect authorization issue in the Chrome FileSystem API that, when a renderer process is compromised, permits a crafted HTML page to read sensitive data from the FileSystem. This vulnerability exists in versions before 156.0.8078.47 and is classified as insecure authorization (CWE‑863), leading to information disclosure within the browser context (Chromium security severity: Medium).

Affected Systems

The issue is present in any installation of Google Chrome older than build 156.0.8078.47, regardless of operating system. Users running Windows, macOS, Linux, or other platforms that ship with Chrome and enable the FileSystem feature are affected.

Risk and Exploitability

The CVSS score of 8.8 indicates high severity. The EPSS score is less than 1 percent, indicating a very low probability of active exploitation, and the vulnerability is not listed in the CISA KEV catalog. The likely attack vector is a remote attacker delivering a malicious HTML page that triggers the incorrect authorization after compromising the renderer process. The risk varies with the attacker’s skill and Chrome’s sandbox defenses.

Generated by OpenCVE AI on November 4, 2026 at 06:52 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Upgrade Google Chrome to version 156.0.8078.47 or later
  • Enable automatic updates to receive the latest security patches
  • If the FileSystem API is not needed, disable it via Chrome flags or restrict its usage and monitor sandbox logs for anomalous activity

Generated by OpenCVE AI on November 4, 2026 at 06:52 UTC.

Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4853-1 chromium security update
Debian DSA Debian DSA DSA-6577-1 chromium security update
History

Wed, 04 Nov 2026 07:15:00 +0000

Type Values Removed Values Added
Title Chrome FileSystem Authorization Bypass Causing Sensitive Data Disclosure

Wed, 04 Nov 2026 03:15:00 +0000

Type Values Removed Values Added
Title Use‑After‑Free in Chrome FileSystem Enables Remote Code Execution

Tue, 03 Nov 2026 22:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Tue, 03 Nov 2026 21:30:00 +0000

Type Values Removed Values Added
Description Use after free in FileSystem in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Medium) Incorrect authorization in FileSystem in Google Chrome prior to 156.0.8078.47 allowed a remote attacker who had compromised the renderer process to obtain sensitive information via a crafted HTML page. (Chromium security severity: Medium)
Weaknesses CWE-863

Thu, 22 Oct 2026 15:45:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*

Thu, 22 Oct 2026 15:30:00 +0000

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

Thu, 22 Oct 2026 14:45:00 +0000

Type Values Removed Values Added
Title Use‑After‑Free in Chrome FileSystem Enables Remote Code Execution

Wed, 21 Oct 2026 00:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Tue, 20 Oct 2026 21:30:00 +0000

Type Values Removed Values Added
Description Use after free in FileSystem in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)
Weaknesses CWE-416
References

Subscriptions

Google Chrome
cve-icon MITRE

Status: PUBLISHED

Assigner: Chrome

Published:

Updated: 2026-11-03T21:20:59.010Z

Reserved: 2026-10-19T23:06:27.013Z

Link: CVE-2026-113177

cve-icon Vulnrichment

Updated: 2026-10-20T23:02:00.599Z

cve-icon NVD

Status : Modified

Published: 2026-10-20T22:19:10.427

Modified: 2026-11-03T22:18:45.570

Link: CVE-2026-113177

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-04T07:00:14Z

Weaknesses