Vulnerability in Edgelesssys Contrast
CVE-2025-71424
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`.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (5.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 6th percentile — 5.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
Weakness classification (CWE)
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)
Frequently asked questions
- What is CVE-2025-71424?
- CVE-2025-71424 is a low-severity vulnerability in Edgelesssys Contrast, classified under Protection Mechanism Failure. CVSS score: 3.5/10. Published 2026-09-27.
- How severe is CVE-2025-71424?
- Low severity. CVSS v3 base score is 3.5 out of 10.