CVE-2026-32610: Nicolargo Glances

High severity, CVSS 8.1. EPSS: 0.5% chance of exploitation in the next 30 days.

Glances is an open-source system cross-platform monitoring tool. Prior to version 4.5.2, the Glances REST API web server ships with a default CORS configuration that sets `allow_origins=["*"]` combined with `allow_credentials=True`. When both of these options are enabled together, Starlette's `CORSMiddleware` reflects the requesting `Origin` header value in the `Access-Control-Allow-Origin` response header instead of returning the literal `*` wildcard. This effectively grants any website the ability to make credentialed cross-origin API requests to the Glances server, enabling cross-site data theft of system monitoring information, configuration secrets, and command line arguments from any user who has an active browser session with a Glances instance. Version 4.5.2 fixes the issue.

Affected products

• Nicolargo Glances: before 4.5.2 (fixed in 4.5.2)

Published 2026-03-18. Last modified 2026-06-17.