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

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Summary

CVECVE-2026-46611
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-25 19:16:37 UTC
Updated2026-06-26 04:17:43 UTC
DescriptionGlances 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.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

EPSS: 0.001560000 probability, percentile 0.051900000 (date 2026-06-26)

Problem Types: CWE-346 | CWE-350 | CWE-346 CWE-346: Origin Validation Error | CWE-350 CWE-350: Reliance on Reverse DNS Resolution for a Security-Critical Action

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Nicolargo Glances affected < 4.5.5 Not specified

References

ReferenceSourceLinkTags
github.com/nicolargo/glances/releases/tag/v4.5.5 [email protected] github.com
github.com/nicolargo/glances/security/advisories/GHSA-w856-8p3r-p338 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
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