Glances is an open-source system cross-platform monitoring tool. Prior to version 4.5.4, the Glances web server exposes a REST API (`/api/4/*`) that is accessible without authentication and allows cross-origin requests from any origin due to a permissive CORS policy (`Access-Control-Allow-Origin: *`). This allows a malicious website to read sensitive system information from a running Glances instance in the victim’s browser, leading to cross-origin data exfiltration. While a previous advisory exists for XML-RPC CORS issues, this report demonstrates that the REST API (`/api/4/*`) is also affected and exposes significantly more sensitive data. Version 4.5.4 patches the issue.
Fix
Patch, vendor advisory and mitigation references on NVD 3
- https://github.com/nicolargo/glances/commit/fdfb977b1d91b5e410bc06c4e19f8bedb0005ce9 Patch
- https://github.com/nicolargo/glances/security/advisories/GHSA-gfc2-9qmw-w7vh Exploit, Vendor Advisory
- https://github.com/nicolargo/glances/security/advisories/GHSA-gfc2-9qmw-w7vh Exploit, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 7.7 · nicolargoNVD modified 2026-10-26 21:10
Affected (CPE criteria) 1
cpe:2.3:a:nicolargo:glances:*:*:*:*:*:*:*:*