Copyright © 2012 Red Hat, Inc. All rights reserved. Moderate 2026-06-25T18:00:47 glances: Glances: Information disclosure via DNS rebinding attack 5.3 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N CWE-346

Glances is an open-source system cross-platform monitoring tool. Prior to 4.5.5, the Glances XML-RPC server (glances -s, implemented in glances/server.py) does not validate the HTTP Host header, leaving it vulnerable to DNS rebinding attacks. An attacker can exploit DNS rebinding to exfiltrate the full system monitoring dataset from a victim's browser. This vulnerability is fixed in 4.5.5.

A vulnerability in the Glances XML-RPC server fails to properly validate HTTP Host headers, enabling DNS rebinding attacks. If a user is tricked into visiting a malicious website, a remote attacker can exploit this flaw to exfiltrate sensitive system monitoring data.

This moderate DNS rebinding vulnerability in the Glances XML-RPC server allows for information disclosure. An attacker can exfiltrate system monitoring data, provided they trick a user into visiting a malicious site. The XML-RPC server is a legacy interface started via the -s or --server flags. To maintain remote monitoring functionality securely, operators should migrate to the actively maintained REST API by starting Glances with the -w or --webserver flag instead. The REST API component is protected against DNS rebinding attacks. https://www.cve.org/CVERecord?id=CVE-2026-46611 https://nvd.nist.gov/vuln/detail/CVE-2026-46611 https://github.com/nicolargo/glances/releases/tag/v4.5.5 https://github.com/nicolargo/glances/security/advisories/GHSA-w856-8p3r-p338