CVE-2026-32632
MEDIUM5.9EPSS 0.03%Glances's REST/WebUI Lacks Host Validation and Remains Exposed to DNS Rebinding
Description
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.
Affected packages (2)
- Debian/glancesfrom 0
- PyPI/glancesfrom 0, < 4.5.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N |
References (6)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-32632
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2026-32632
- PATCHhttps://github.com/nicolargo/glances
- WEBhttps://github.com/nicolargo/glances/commit/5850c564ee10804fdf884823b9c210eb954dd1f9
- WEBhttps://github.com/nicolargo/glances/releases/tag/v4.5.2
- WEBhttps://github.com/nicolargo/glances/security/advisories/GHSA-hhcg-r27j-fhv9