Edgeless Systems Contrast before 1.9.1 Insecure Volume Mount
Published Sep 27, 2026
5.1
MEDIUMCVSS 4.0
EPSS 0.16%
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 products
-
- Version 0StatusaffectedConstraints<1.9.1
- Version 1.9.1StatusunaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Edgelesssys | Contrast | unaffected |
|
No data.
No data.
No Red Hat product state for this CVE.
github.com/edgelesssys/contrast
Go
Introduced 0 Fixed 1.9.1
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| Go | github.com/edgelesssys/contrast | 0 | 1.9.1 |
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Sep 28, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Not enough EPSS history yet for a chart. At least two recorded scores are needed.
Percentile over time
Not enough EPSS history yet for a chart. At least two recorded scores are needed.
References (2)
- https://github.com/edgelesssys/contrast/security/advisories/GHSA-phhq-63jg-fp7r vendor-advisory
- https://www.vulncheck.com/advisories/edgeless-systems-contrast-before-1.9.1-insecure-volume-mount third-party-advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/edgelesssys/contrast/security/advisories/GHSA-phhq-63jg-fp7r | vendor-advisory | |
| https://www.vulncheck.com/advisories/edgeless-systems-contrast-before-1.9.1-insecure-volume-mount | third-party-advisory |
Change history (0)
No recorded changes yet.