CVE-2026-109358
Received Received - Intake

Incorrect Permissions in Edgeless Systems Contrast Allow Privilege Escalation

Publication date: 2026-10-12

Last updated on: 2026-10-12

Assigner: VulnCheck

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.

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Meta Information

Published
2026-10-12
Last Modified
2026-10-12
Generated
2026-10-12
AI Q&A
2026-10-12
EPSS Evaluated
N/A
NVD
CVE-2026-109358
EUVD
EUVD-2026-97660

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
edgelesssys contrast 1.8.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-732 The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.

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Executive Summary

This vulnerability is an incorrect permissions issue in Edgeless Systems Contrast versions 1.8.0 through 1.24.0. The node installer writes the containerd configuration file with world-writable permissions (0666), allowing local unprivileged users to modify the file. Attackers could exploit this by changing settings like the runc location to escalate privileges.

Detection Guidance

Check the permissions of the containerd config file, typically located at /etc/containerd/config.toml, using the command: ls -l /etc/containerd/config.toml. If it shows world-writable permissions (0666), the system is vulnerable.

Impact Analysis

Local unprivileged users on affected nodes can modify the containerd config to escalate privileges. This could allow attackers to gain elevated access to the system, potentially compromising confidentiality, integrity, and availability of data and services.

Mitigation Strategies

Update Contrast to version 1.24.1 or later. If updating is not possible, manually change the containerd config file permissions to 0644 using chmod 0644 /etc/containerd/config.toml. Restrict access to the containerd config directory to root only.

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