CVE-2026-46611: Glances: XML-RPC Server Missing Host Header Validation Enables DNS Rebinding Attack

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-25 · updated 2026-10-25
Weakness: CWE-346

Description

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.

Affected products

nicolargo glances: before 4.5.5

References

https://github.com/nicolargo/glances/releases/tag/v4.5.5
https://github.com/nicolargo/glances/security/advisories/GHSA-w856-8p3r-p338
https://github.com/nicolargo/glances/security/advisories/GHSA-w856-8p3r-p338

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