CVE-2026-46608
Glances: XML-RPC Multi-Origin CORS Configuration Silently Falls Back to Wildcard (Incomplete Fix for CVE-2026-33533)
Description
Glances is an open-source system cross-platform monitoring tool. Prior to 4.5.5, the Glances XML-RPC server (glances -s) introduced a configurable CORS origin list in version 4.5.3 as a mitigation for CVE-2026-33533. However, the implementation silently falls back to Access-Control-Allow-Origin: * whenever cors_origins contains more than one entry. An operator who configures an explicit two-entry allowlist (e.g. two internal dashboard origins) intending to restrict browser access instead receives the unrestricted wildcard. A malicious web page served from any origin can issue a CORS simple request to /RPC2 and read the full system monitoring dataset without the victim's knowledge. This vulnerability is fixed in 4.5.5.
INFO
Published Date :
June 25, 2026, 7:16 p.m.
Last Modified :
Oct. 25, 2026, 10:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update Glances to version 4.5.5.
- Verify the CORS configuration is correctly applied.
- Restrict access to the Glances XML-RPC server.
Public PoC/Exploit Available at Github
CVE-2026-46608 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-46608.
| URL | Resource |
|---|---|
| https://github.com/nicolargo/glances/releases/tag/v4.5.5 | |
| https://github.com/nicolargo/glances/security/advisories/GHSA-87qc-fj39-wccr |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-46608 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-46608
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
CVEs, conference materials, research.
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-46608 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-46608 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 25, 2026
Action Type Old Value New Value Added Translation Title: glances de nicolargo, Description: Glances es una herramienta de monitoreo de sistema multiplataforma de código abierto. Antes de la versión 4.5.5, el servidor XML-RPC de Glances (glances -s) introdujo una lista configurable de orígenes CORS en la versión 4.5.3 como una mitigación para CVE-2026-33533. Sin embargo, la implementación vuelve silenciosamente a Access-Control-Allow-Origin: * siempre que cors_origins contenga más de una entrada. Un operador que configura una lista de permitidos explícita de dos entradas (por ejemplo, dos orígenes de panel interno) con la intención de restringir el acceso del navegador, en su lugar, recibe el comodín sin restricciones. Una página web maliciosa servida desde cualquier origen puede emitir una solicitud simple CORS a /RPC2 y leer el conjunto completo de datos de monitoreo del sistema sin el conocimiento de la víctima. Esta vulnerabilidad está corregida en la versión 4.5.5. -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 26, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-46608', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-26T17:50:40.059541Z'} -
New CVE Received by [email protected]
Jun. 25, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'nicolargo', 'product': 'glances', 'versions': [{'status': 'affected', 'version': '< 4.5.5'}]}] Added Description Glances is an open-source system cross-platform monitoring tool. Prior to 4.5.5, the Glances XML-RPC server (glances -s) introduced a configurable CORS origin list in version 4.5.3 as a mitigation for CVE-2026-33533. However, the implementation silently falls back to Access-Control-Allow-Origin: * whenever cors_origins contains more than one entry. An operator who configures an explicit two-entry allowlist (e.g. two internal dashboard origins) intending to restrict browser access instead receives the unrestricted wildcard. A malicious web page served from any origin can issue a CORS simple request to /RPC2 and read the full system monitoring dataset without the victim's knowledge. This vulnerability is fixed in 4.5.5. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N Added CWE CWE-183 Added CWE CWE-942 Added Reference https://github.com/nicolargo/glances/releases/tag/v4.5.5 Added Reference https://github.com/nicolargo/glances/security/advisories/GHSA-87qc-fj39-wccr