System monitoring data disclosure via unchecked Host header
Published Jun 25, 2026 · Updated Jun 25, 2026
Origin validation failure in the Glances XML-RPC server before 4.5.5 allows remote attackers to read monitoring data via DNS rebinding. The GlancesXMLRPCHandler in glances/server.py inherits the default request parser and accepts attacker-controlled Host values without validation. Exploitation requires a user to visit an attacker-controlled page from a browser that can reach the XML-RPC service; the read-only API exposes host, process, network, storage, and container details.
Summary
What happened
Origin validation failure in the Glances XML-RPC server before 4.5.5 allows remote attackers to read monitoring data via DNS rebinding. The GlancesXMLRPCHandler in glances/server.py inherits the default request parser and accepts attacker-controlled Host values without validation. Exploitation requires a user to visit an attacker-controlled page from a browser that can reach the XML-RPC service; the read-only API exposes host, process, network, storage, and container details.
The record
- CVE
- CVE-2026-46611
- Published
- Jun 25, 2026
- Updated
- Jun 25, 2026
- Vendor
- Glances Project
- Product
- Glances
- Classifications
- CWE-350, CWE-346, T1189
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 25, 2026CVE publishedPublication date reported by the CVE source.
- Jun 25, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 4.5.5
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- GHSA DNS-rebinding request sequenceproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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