Read the docs
TI-2025-43535 Aliases CVE-2025-71424GHSA-4585-2273-g8cw

Edgeless Systems Contrast before 1.9.1 Insecure Volume Mount

Priority LOW 22CWE-693Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-693.

Summary

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`.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00163 5th percentileScored 2026-11-07
Fix Fixed contrast (edgelesssys): 1.9.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
edgelesssyscontrastbefore 1.9.11.9.1Patch availableCNA
  • contrast Vendoredgelesssys Affected before 1.9.1 Fixed in 1.9.1 Patch available CNA

Remediation

  • Fix · CNA contrast (edgelesssys) Fixed in 1.9.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-71424
  2. 2026-10-03 Alias added: GHSA-4585-2273-g8cw

References

Advisory 1

  • TI-2026-64974 Edgeless Systems Contrast through 1.20.0 Denial of Service via ciphertextContainer CVSS 4.0MEDIUM 5.3
  • TI-2026-64973 Contrast before 1.16.0 Remote Attestation Relay Attack CVSS 4.0CRITICAL 9.1
  • TI-2026-64976 Contrast before 1.19.1 CopyFile Policy Symlink Subversion CVSS 4.0HIGH 8.6
  • TI-2026-64971 Contrast before 1.23.1 Image Substitution via Policy Generation CVSS 4.0HIGH 8.6
  • TI-2026-71174 Contrast world-writable containerd config allows privilege escalation CVSS 4.0HIGH 8.5
  • TI-2025-43536 Contrast before 1.8.1 Information Disclosure via Logging CVSS 4.0HIGH 8.5
See all 14 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences