---
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: critical
cvss: 9.6
cvssVector: 'CVSS:3.1/AV:N/AC:L/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: '2026-10-09'
sourceUpdated: '2026-10-09T14:17:09.850'
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
  - exploit-available
epss: 0.00234
epssPercentile: 0.14192
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-28T13:53:22.400645Z'
ingestedAt: '2026-09-27T02:41:45.568Z'
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/muhammad-usama-sardar/intra-handshake-fail'
  checkedAt: '2026-10-27T16:52:20.449Z'
exploitAvailable: true
---

## 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.