Overly Permissive Cross-domain Whitelist Affecting glances package, versions *


Severity

Recommended
low

Based on Debian security rating.

Threat Intelligence

EPSS
0.33% (26th percentile)

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  • Snyk IDSNYK-DEBIAN13-GLANCES-15924852
  • published7 Apr 2026
  • disclosed2 Apr 2026

Introduced: 2 Apr 2026

CVE-2026-33533  (opens in a new tab)
CWE-942  (opens in a new tab)

How to fix?

There is no fixed version for Debian:13 glances.

NVD Description

Note: Versions mentioned in the description apply only to the upstream glances package and not the glances package as distributed by Debian. See How to fix? for Debian:13 relevant fixed versions and status.

Glances is an open-source system cross-platform monitoring tool. Prior to version 4.5.3, the Glances XML-RPC server (activated with glances -s or glances --server) sends Access-Control-Allow-Origin: * on every HTTP response. Because the XML-RPC handler does not validate the Content-Type header, an attacker-controlled webpage can issue a CORS "simple request" (POST with Content-Type: text/plain) containing a valid XML-RPC payload. The browser sends the request without a preflight check, the server processes the XML body and returns the full system monitoring dataset, and the wildcard CORS header lets the attacker's JavaScript read the response. The result is complete exfiltration of hostname, OS version, IP addresses, CPU/memory/disk/network stats, and the full process list including command lines (which often contain tokens, passwords, or internal paths). This issue has been patched in version 4.5.3.

CVSS Base Scores

version 3.1