PYSEC-2026-2171

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Import Source
https://github.com/pypa/advisory-database/blob/main/vulns/glances/PYSEC-2026-2171.yaml
JSON Data
https://api.osv.dev/v1/vulns/PYSEC-2026-2171
Aliases
Published
2026-03-18T18:16:28.760Z
Modified
2026-07-13T07:15:31.598073816Z
Severity
  • 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N CVSS Calculator
Summary
[none]
Details

Glances is an open-source system cross-platform monitoring tool. Glances recently added DNS rebinding protection for the MCP endpoint, but prior to version 4.5.2, the main REST/WebUI FastAPI application still accepts arbitrary Host headers and does not apply TrustedHostMiddleware or an equivalent host allowlist. As a result, the REST API, WebUI, and token endpoint remain reachable through attacker-controlled domains in classic DNS rebinding scenarios. Once the victim browser has rebound the attacker domain to the Glances service, same-origin policy no longer protects the API because the browser considers the rebinding domain to be the origin. This is a distinct issue from the previously reported default CORS weakness. CORS is not required for exploitation here because DNS rebinding causes the victim browser to treat the malicious domain as same-origin with the rebinding target. Version 4.5.2 contains a patch for the issue.

References

Affected packages

PyPI / glances

Package

Name
glances
View open source insights on deps.dev
Purl
pkg:pypi/glances

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.5.2

Affected versions

1.*
1.3.1
1.3.2
1.3.3
1.3.4
1.3.5
1.3.6
1.3.7
1.4
1.4.1
1.4.1.1
1.4.2
1.4.2.1
1.5
1.5.1
1.5.2
1.6
1.6.1
1.7
1.7.1
1.7.2
1.7.3
1.7.4
1.7.5
1.7.6
1.7.7
2.*
2.0
2.0.1
2.1
2.1.1
2.1.2
2.2
2.2.1
2.3
2.4
2.4.1
2.4.2
2.5
2.5.1
2.6
2.6.1
2.6.2
2.7
2.7.1
2.8
2.8.1
2.8.2
2.8.3
2.8.4
2.8.5
2.8.6
2.8.7
2.8.8
2.9.0
2.9.1
2.10
2.11
2.11.1
3.*
3.0
3.0.1
3.0.2
3.1.0
3.1.1
3.1.2
3.1.3
3.1.4
3.1.4.1
3.1.5
3.1.6
3.1.6.1
3.1.6.2
3.1.7
3.2.0
3.2.1
3.2.2
3.2.3
3.2.3.1
3.2.4
3.2.4.1
3.2.4.2
3.2.5
3.2.6.1
3.2.6.2
3.2.6.3
3.2.6.4
3.2.7
3.3.0
3.3.0.1
3.3.0.2
3.3.0.3
3.3.0.4
3.3.1
3.3.1.1
3.4.0
3.4.0.1
3.4.0.2
3.4.0.3
3.4.0.4
3.4.0.5
4.*
4.0.1
4.0.2
4.0.3
4.0.4
4.0.5
4.0.6
4.0.7
4.0.8
4.1.0
4.1.1
4.1.2
4.2.0
4.2.1
4.3.0
4.3.0.1
4.3.0.3
4.3.0.4
4.3.0.5
4.3.0.6
4.3.0.7
4.3.0.8
4.3.1
4.3.2
4.3.3
4.4.0
4.4.1
4.5.0
4.5.0.1
4.5.0.2
4.5.0.3
4.5.0.4
4.5.0.5
4.5.1

Database specific

source 
"https://github.com/pypa/advisory-database/blob/main/vulns/glances/PYSEC-2026-2171.yaml"