Glances's Default CORS Configuration Allows Cross-Origin Credential Theft
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.
Summary
Glances is an open-source system cross-platform monitoring tool. Prior to version 4.5.2, the Glances REST API web server ships with a default CORS configuration that sets `allow_origins=["*"]` combined with `allow_credentials=True`. When both of these options are enabled together, Starlette's `CORSMiddleware` reflects the requesting `Origin` header value in the `Access-Control-Allow-Origin` response header instead of returning the literal `*` wildcard. This effectively grants any website the ability to make credentialed cross-origin API requests to the Glances server, enabling cross-site data theft of system monitoring information, configuration secrets, and command line arguments from any user who has an active browser session with a Glances instance. Version 4.5.2 fixes the issue.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| nicolargo | glances | before 4.5.2 | 4.5.2 | Patch available | CNA |
| — | Glances (PyPI) | before 4.5.2 | 4.5.2 | Patch available | GHSA-9jfm-9rc6-2hfq |
- glances Vendornicolargo Affected before 4.5.2 Fixed in 4.5.2 Patch available CNA
- Glances (PyPI) Vendor— Affected before 4.5.2 Fixed in 4.5.2 Patch available GHSA-9jfm-9rc6-2hfq
Remediation
- Fix · CNA glances (nicolargo) Fixed in 4.5.2
- Fix · GHSA-9jfm-9rc6-2hfq Glances (PyPI) Fixed in 4.5.2 Advisory →
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2026-32610
- 2026-10-03 Alias added: GHSA-9jfm-9rc6-2hfq
References
More nicolargo Glances vulnerabilities
- TI-2026-25142 Glances's Browser API Exposes Reusable Downstream Credentials via `/api/4/serverslist` CVSS 3.1CRITICAL 9.1
- TI-2026-25106 Glances exposes the REST API without authentication CVSS 4.0HIGH 8.7
- TI-2026-27083 Glances Vulnerable to Cross-Origin Information Disclosure via Unauthenticated REST API (/api/4) due to Permissive CORS CVSS 4.0HIGH 7.7
- TI-2026-25120 Glances has a SQL Injection in DuckDB Export via Unparameterized DDL Statements CVSS 3.1CRITICAL 9.1
- TI-2026-25118 Glances has Incomplete Secrets Redaction: /api/v4/args Endpoint Leaks Password Hash and SNMP Credentials CVSS 3.1HIGH 7.5
- TI-2026-25143 Glances Central Browser Autodiscovery Leaks Reusable Credentials to Zeroconf-Spoofed Servers CVSS 3.1HIGH 8.1
Sources
- CVE-2026-32610 · CVE Program
- CVE-2026-32610 · NVD
- FIRST EPSS
- GHSA-9jfm-9rc6-2hfq · GitHub Advisory Database · CC BY 4.0
- CVE-2026-32610 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences