Vulnerability Description
Glances is an open-source system cross-platform monitoring tool. Prior to version 4.5.3, the Glances XML-RPC server (activated with glances -s or glances --server) sends Access-Control-Allow-Origin: * on every HTTP response. Because the XML-RPC handler does not validate the Content-Type header, an attacker-controlled webpage can issue a CORS "simple request" (POST with Content-Type: text/plain) containing a valid XML-RPC payload. The browser sends the request without a preflight check, the server processes the XML body and returns the full system monitoring dataset, and the wildcard CORS header lets the attacker's JavaScript read the response. The result is complete exfiltration of hostname, OS version, IP addresses, CPU/memory/disk/network stats, and the full process list including command lines (which often contain tokens, passwords, or internal paths). This issue has been patched in version 4.5.3.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Nicolargo | Glances | < 4.5.3 |
Related Weaknesses (CWE)
References
- https://github.com/nicolargo/glances/commit/dcb39c3f12b2a1eec708c58d22d7a1d62bdfPatch
- https://github.com/nicolargo/glances/releases/tag/v4.5.3ProductRelease Notes
- https://github.com/nicolargo/glances/security/advisories/GHSA-7p93-6934-f4q7ExploitVendor Advisory
FAQ
What is CVE-2026-33533?
CVE-2026-33533 is a vulnerability with a CVSS score of 6.5 (MEDIUM). Glances is an open-source system cross-platform monitoring tool. Prior to version 4.5.3, the Glances XML-RPC server (activated with glances -s or glances --server) sends Access-Control-Allow-Origin: *...
How severe is CVE-2026-33533?
CVE-2026-33533 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-33533?
Check the references section above for vendor advisories and patch information. Affected products include: Nicolargo Glances.