CVE-2026-68518: Glances: Command injection bypass of action-template sanitizer via cross-field shell-operator reconstruction

Severity: high (CVSS 8.8 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-17 · updated 2026-10-23
Weakness: CWE-78

Description

Glances is an open-source system cross-platform monitoring tool. Prior to 4.5.6, _sanitize_mustache_dict() in glances/actions.py sanitizes individual Mustache values before chevron.render(), allowing adjacent unescaped Mustache variables to reconstruct shell operators that secure_popen() executes when attacker-controlled process or container fields are rendered by an administrator-configured action template. This issue is fixed in 4.5.6.

Affected products

nicolargo glances: before 4.5.6

References

https://github.com/nicolargo/glances/commit/9c280eae5419da680827024b60f6265956e31994
https://github.com/nicolargo/glances/releases/tag/v4.5.6
https://github.com/nicolargo/glances/security/advisories/GHSA-qcpp-8x79-hhp3
https://github.com/nicolargo/glances/security/advisories/GHSA-qcpp-8x79-hhp3

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