CVE-2026-109358: Edgeless Systems Contrast 1.8.0 before 1.24.1 World-Writable Containerd Config Privilege Escalation

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-12 · updated 2026-10-16
Weakness: CWE-732

Description

Edgeless Systems Contrast 1.8.0 before 1.24.1 contains an incorrect permissions vulnerability where the node installer writes the containerd config world-writable (0666). Local unprivileged users on the node can modify the containerd config, for example overwriting the runc location, to escalate privileges.

Affected products

edgelesssys contrast: from 1.8.0 before 1.24.1 — fixed in 1.24.1

How to fix

Upgrade to a fixed version: edgelesssys contrast 1.24.1. Check the vendor advisory for mitigations.

References

https://github.com/edgelesssys/contrast/security/advisories/GHSA-376m-h37w-4rvq
https://www.vulncheck.com/advisories/edgeless-systems-contrast-1.8.0-before-1.24.1-world-writable-containerd-config-privilege-escalation

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