Is CVE-2026-109358 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-109358 being exploited in the wild.

How severe is CVE-2026-109358?

High severity, with a CVSS score of 7.8, published 12 October 2026.

Which products and versions are affected?

Edgeless Systems Contrast 1.8.0 through 1.24.0.

Is there a fix for CVE-2026-109358?

Yes: fixed in Contrast 1.24.1. Until then: Delete the node installer after it finishes and manually fix permissions on the containerd.conf file on all nodes to be accessible only to privileged users. Alternatively, restrict the containerd config directory to root-only access. [{"kind": "disclosed", "at": "2026-09-24", "note": "GitHub Security Advisory GHSA-376m-h37w-4rvq published"}, {"kind": "advisory", "at": "2026-10-12", "note": "CVE-2026-109358 published on NVD"}] Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-109358 attacked?

It is attacked with local access, in a software library.

Am I affected by CVE-2026-109358?

Check whether you run Edgeless Systems Contrast at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-109358: Edgeless Systems Contrast privilege escalation in node installer

CVE-2026-109358 · Severity: high · CVSS 7.8 · Published 2026-10-12

Edgeless Systems Contrast is a software component that manages container runtime configuration on nodes in Kubernetes clusters. Versions 1.8.0 through 1.24.0 write the containerd configuration file with world-readable and world-writable permissions, allowing any local user on the node to modify it. An attacker could exploit this to change the container runtime location and execute arbitrary code with root privileges.

Technologies: Edgeless Systems Contrast. Vendors: Edgeless Systems.

Quick answers

Is CVE-2026-109358 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-109358 being exploited in the wild.
How severe is CVE-2026-109358?: High severity, with a CVSS score of 7.8, published 12 October 2026.
Which products and versions are affected?: Edgeless Systems Contrast 1.8.0 through 1.24.0.
Is there a fix for CVE-2026-109358?: Yes: fixed in Contrast 1.24.1. Until then: Delete the node installer after it finishes and manually fix permissions on the containerd.conf file on all nodes to be accessible only to privileged users. Alternatively, restrict the containerd config directory to root-only access.</anigation> <parameter name="timeline">[{"kind": "disclosed", "at": "2026-09-24", "note": "GitHub Security Advisory GHSA-376m-h37w-4rvq published"}, {"kind": "advisory", "at": "2026-10-12", "note": "CVE-2026-109358 published on NVD"}] Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-109358 attacked?: It is attacked with local access, in a software library.
Am I affected by CVE-2026-109358?: Check whether you run Edgeless Systems Contrast at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: Contrast 1.24.1

Delete the node installer after it finishes and manually fix permissions on the containerd.conf file on all nodes to be accessible only to privileged users. Alternatively, restrict the containerd config directory to root-only access.</anigation> <parameter name="timeline">[{"kind": "disclosed", "at": "2026-09-24", "note": "GitHub Security Advisory GHSA-376m-h37w-4rvq published"}, {"kind": "advisory", "at": "2026-10-12", "note": "CVE-2026-109358 published on NVD"}]

Technical details

The node installer component creates a containerd configuration file with overly permissive permissions (0o666), leaving it writable by unprivileged local users. An attacker with local access can modify this configuration—for example, by overwriting the runc runtime path—to execute arbitrary code with elevated privileges. This vulnerability requires local access and affects only systems where the containerd config directory is accessible to non-root users; k3s and other systems that restrict directory access are not affected.

Affected products

Edgeless Systems Contrast 1.8.0 through 1.24.0

References

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