Vulnerability · Published Sep 27, 2026 · Assigned by VulnCheck
CVE-2025-71424Edgeless Systems Contrast before 1.9.1 Insecure Volume Mount
Low 3.5
In plain English
A low-severity security flaw in contrast from edgelesssys. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
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`.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/edgelesssys/contrast | 1.9.1 | GHSA-phhq-63jg-fp7r |
| Go | github.com/edgelesssys/contrast | 1.9.1 | GO-2025-3807 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| edgelesssys | contrast | 0 – before 1.9.1 |
Weakness: CWE-693 · Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
References
- GitHub Security Advisory (GHSA-phhq-63jg-fp7r) vendor-advisory
- VulnCheck Advisory: Edgeless Systems Contrast before 1.9.1 Insecure Volume Mount third-party-advisory