---
id: CVE-2026-100833
title: >-
  Contrast (edgelesssys/contrast) versions 1.14.0 before 1.23.1 generate runtime
  policies that fail to detect all container image substitutions
summary: >-
  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 t…
severity: high
cvss: 8.2
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N'
cwe:
  - CWE-20
vendor: edgelesssys
product: contrast
affected:
  - contrast >= 1.14.0 < 1.23.1
published: '2026-09-27'
updated: '2026-09-27'
sourceUpdated: '2026-09-27T02:17:21.323'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-100833'
references:
  - url: >-
      https://github.com/edgelesssys/contrast/security/advisories/GHSA-m2qg-wrxv-h898
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/contrast-before-1.23.1-image-substitution-via-policy-generation
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-27T02:41:45.568Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.