CVE-2025-71424 Edgeless Systems Contrast before 1.9.1 Insecure Volume Mount

What is CVE-2025-71424?

CVE-2025-71424 is a medium-severity path traversal vulnerability in edgelesssys contrast, published on 27 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Contrast, Edgeless Systems' runtime for confidential containers on Kubernetes, is affected in versions up to and including 1.9.0. The VOLUME directive in a Dockerfile (config.volumes in the OCI image configuration) is only a hint and is not handled specially by Kubernetes, but containerd adds a mount point for it when Kubernetes sets none, requiring the runtime to be able to push arbitrary data to the Kata agent. As a result, on bare-metal Contrast deployments (AKS deployments are not affected) that run an image declaring at least one VOLUME for which no Kubernetes mount exists at that path, the untrusted host can write arbitrary file trees below that mount point inside the confidential container, compromising the integrity of a directory that is typically important to the application's core functionality. Version 1.9.1 fixes the issue by disallowing this configuration in `contrast generate`.

Weakness: CWE-693

Which versions are affected by CVE-2025-71424?

3 open source packages ship an affected version, including github.com/edgelesssys/contrast.

How do I fix CVE-2025-71424?

Upgrade github.com/edgelesssys/contrast to 1.9.1 or later.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2025-71424 being exploited?

There is no known exploitation of CVE-2025-71424 in the wild and no public exploit code.

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• GitHub advisory
• How this page is made

Also known as GHSA-4585-2273-g8cw, GHSA-phhq-63jg-fp7r, GO-2025-3807.