Vulnerability · Published Jun 25, 2026 · Assigned by GitHub_M
CVE-2026-46611Glances: XML-RPC Server Missing Host Header Validation Enables DNS Rebinding Attack
Medium 5.3
In plain English
A medium-severity security flaw in glances from nicolargo. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Glances is an open-source system cross-platform monitoring tool. Prior to 4.5.5, the Glances XML-RPC server (glances -s, implemented in glances/server.py) does not validate the HTTP Host header, leaving it vulnerable to DNS rebinding attacks. An attacker can exploit DNS rebinding to exfiltrate the full system monitoring dataset from a victim's browser. This vulnerability is fixed in 4.5.5.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | glances | no fix listed | DEBIAN-CVE-2026-46611 |
| Debian:13 | glances | no fix listed | DEBIAN-CVE-2026-46611 |
| Debian:14 | glances | 4.5.5+dfsg-1 | DEBIAN-CVE-2026-46611 |
| PyPI | glances | 4.5.5 | GHSA-w856-8p3r-p338 |
| PyPI | glances | 4.5.5 | PYSEC-2026-2498 |
| Ubuntu:22.04:LTS | glances | no fix listed | UBUNTU-CVE-2026-46611 |
| Ubuntu:24.04:LTS | glances | no fix listed | UBUNTU-CVE-2026-46611 |
| Ubuntu:25.10 | glances | no fix listed | UBUNTU-CVE-2026-46611 |
| Ubuntu:26.04:LTS | glances | no fix listed | UBUNTU-CVE-2026-46611 |
Affected products (as reported)
Weakness: CWE-346, CWE-350 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
References
- https://github.com/nicolargo/glances/security/advisories/GHSA-w856-8p3r-p338 x_refsource_CONFIRM
- https://github.com/nicolargo/glances/releases/tag/v4.5.5 x_refsource_MISC