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Advisory severityMedium5.3Red Hat Linux

Medium [CVE-2026-46611] Information disclosure via DNS rebinding attack

This medium-severity Red Hat Linux advisory covers CVE-2026-46611.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-46611 Source published Source updated

VulniPulse record published Record updated

CVE-2026-46611
Affected products & platforms
Red Hat LinuxUnclassified
Open source advisory

Summary

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.

If a user is tricked into visiting a malicious website, a remote attacker can exploit this flaw to exfiltrate sensitive system monitoring data. Red Hat severity: Moderate — CVSS 5.3 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N).

Weakness: CWE-346.

Is CVE-2026-46611 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-46611 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-46611?

Upgrade to a fixed release named by Red Hat:

  • 4.5.5

Confirm against the vendor advisory before you patch.

Affected versions
  • < 4.5.5

Official advisory · high-confidence parse· fetched 14 days ago·verify at source

Fixed versions
  • 4.5.5

Official advisory · high-confidence parse· fetched 14 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • 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.

Official advisory · high-confidence parse· fetched 14 days ago·verify at source

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