CVE-2026-68517

Deferred Deferred - Pending Action

Glances 4.5.6 CORS Misconfiguration Exposes REST API Data

Publication date: 2026-08-17

Last updated on: 2026-10-23

Assigner: GitHub, Inc.

Description

Glances is an open-source system cross-platform monitoring tool. Prior to 4.5.6, the cors_origins guard in glances/outputs/glances_restful_api.py uses exact list equality instead of wildcard membership, allowing a multi-origin list containing the wildcard to retain cors_credentials and expose authenticated REST API data to an untrusted website visited by a previously authenticated user. This issue is fixed in 4.5.6.

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Meta Information

Published

2026-08-17

Last Modified

2026-10-23

Generated

2026-11-08

AI Q&A

2026-08-17

EPSS Evaluated

2026-11-07

NVD

CVE-2026-68517

EUVD

EUVD-2026-60301

Affected Vendors & Products

Vendor	Product	Version / Range
glances	glances	to 4.5.6 (exc)
nicolargo	glances	to 4.5.6 (exc)
nicolargo	glances	4.5.6

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-942	The product uses a web-client protection mechanism such as a Content Security Policy (CSP) or cross-domain policy file, but the policy includes untrusted domains with which the web client is allowed to communicate.

Attack-Flow Graph

Executive Summary

This vulnerability affects the Glances monitoring tool's REST API. It involves a flawed CORS (Cross-Origin Resource Sharing) check that uses exact list equality instead of wildcard membership. This allows attackers to bypass credentials protection by including a wildcard (*) in a multi-origin allowlist, potentially exposing authenticated REST API data to untrusted websites.

Detection Guidance

Check Glances version with 'glances --version'. If it is below 4.5.6, the system is vulnerable. Inspect the REST API configuration file for CORS settings containing wildcards in multi-origin allowlists.

Impact Analysis

An attacker could exploit this to access sensitive data from your Glances monitoring tool, including process lists with command-line arguments, usernames, and PIDs. This happens if you visit an untrusted website while authenticated to the Glances REST API, as the attacker's site could make cross-origin requests with your cached credentials.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, potentially violating GDPR's data protection requirements or HIPAA's confidentiality rules. Unauthorized exposure of usernames, PIDs, and command-line arguments may result in compliance breaches depending on the data processed by Glances.

Mitigation Strategies

Upgrade Glances to version 4.5.6 or later. If upgrading is not possible, modify the CORS configuration in glances_restful_api.py to replace exact equality checks with wildcard membership tests.

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