nicolargo glances XML-RPC Server cross-domain policy

Summaryinfo

A vulnerability was found in nicolargo glances. It has been declared as problematic. Affected by this issue is some unknown functionality of the component XML-RPC Server. The manipulation results in cross-domain policy. This vulnerability is cataloged as CVE-2026-33533. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, was found in nicolargo glances (version now known). Affected is some unknown processing of the component XML-RPC Server. The manipulation with an unknown input leads to a cross-domain policy vulnerability. CWE is classifying the issue as CWE-942. The product uses a cross-domain policy file that includes domains that should not be trusted. This is going to have an impact on integrity. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-33533. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/29/2026).

The vulnerability scanner Nessus provides a plugin with the ID 304873 (Linux Distros Unpatched Vulnerability : CVE-2026-33533), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (304873). If you want to get best quality of vulnerability data, you may have to visit VulDB.

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Vendor

• nicolargo

Name

• glances

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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