Contrast before 1.19.1 CopyFile Policy Symlink Subversion
Published Sep 27, 2026
8.6
HIGHCVSS 4.0
EPSS 0.22%
Description
Contrast is a confidential-computing runtime for Kubernetes. In versions before 1.19.1, the Kata agent policies generated by the Contrast CLI contained a flaw in the CopyFile verification that allowed arbitrary writes to the guest root filesystem. A malicious process on the untrusted host able to connect to the Kata agent VSOCK could issue a series of CopyFile requests to overwrite security-critical files in the guest or trick the workload into disclosing sensitive data, effectively amounting to a full guest takeover. Users unable to upgrade can apply an equivalent rego policy fix passed to 'contrast generate --policy'.
Affected products
-
- Version 0StatusaffectedConstraints<1.19.1
- Version 1.19.1StatusunaffectedConstraints-
- 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 1.19.1
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| Go | github.com/edgelesssys/contrast | 0 | 1.19.1 |
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/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
TotalDecision
n/aAssessed Sep 30, 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-rh99-wc69-c255 vendor-advisory
- https://www.vulncheck.com/advisories/contrast-before-1.19.1-copyfile-policy-symlink-subversion third-party-advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/edgelesssys/contrast/security/advisories/GHSA-rh99-wc69-c255 | vendor-advisory | |
| https://www.vulncheck.com/advisories/contrast-before-1.19.1-copyfile-policy-symlink-subversion | third-party-advisory |
Change history (0)
No recorded changes yet.