Permissive Cross-domain Policy with Untrusted Domains Affecting glances package, versions [,4.5.4)
Threat Intelligence
This vulnerability is trending on Twitter; this may indicate a growing threat.
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about Permissive Cross-domain Policy with Untrusted Domains vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-PYTHON-GLANCES-16318408
- published28 Apr 2026
- disclosed21 Apr 2026
- creditVenukamatchi
Introduced: 21 Apr 2026
CVE-2026-34839 (opens in a new tab)How to fix?
Upgrade Glances to version 4.5.4 or higher.
Overview
Glances is an A cross-platform curses-based monitoring tool
Affected versions of this package are vulnerable to Permissive Cross-domain Policy with Untrusted Domains via the REST API when a permissive CORS policy is configured, allowing unauthenticated cross-origin requests to access sensitive system information. An attacker can exfiltrate confidential data by enticing a victim to visit a malicious website that issues requests to the exposed API endpoint.