CVE-2026-100833

Contrast (edgelesssys/contrast) versions 1.14.0 before 1.23.1 generate runtime policies that fail to detect all container image substitutions. A bad rebase during a Kata Containers update accidentally introduced an `allow_storage` rule that accepts storage entries using the `image_guest_pull` driver without verifying the image digest. An attacker with access to the Kata agent API — for example, a Kubernetes cluster administrator in Contrast's threat model — can therefore substitute a container image with an exploit payload, provided the substituted image satisfies the remaining policy rules, undermining the confidential container's integrity guarantees.

CVSS v3 9.6 CRITICAL

9.6^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.1 / Impact : 5.8

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/edgelesssys/contrast/security/advisories/GHSA-m2qg-wrxv-h898
https://www.vulncheck.com/advisories/contrast-before-1.23.1-image-substitution-via-policy-generation

Configurations

No configuration.

History

09 Oct 2026, 14:17

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~8.2~~	v2 : unknown v3 : 9.6

27 Sep 2026, 02:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-27 02:17

Updated : 2026-10-09 14:17

NVD link : CVE-2026-100833

Mitre link : CVE-2026-100833

CVE.ORG link : CVE-2026-100833

JSON object : View

Products Affected

No product.

CWE

CWE-20

Improper Input Validation

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