---
cve: "CVE-2026-100833"
severity: "HIGH"
cvss: 7.6
epss: "0.2%"
vendor: "edgelesssys"
kev: false
exploited: false
published: "2026-09-27 02:17:21"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-10-01T20:45:15+02:00"
---

# CVE-2026-100833

> 7.6 HIGH · 🧪 PoC

## Beschreibung

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.

## CNA-Record (Kanon, cvelistV5)

- CNA: **VulnCheck**
- State: PUBLISHED
- Stand: 2026-09-28 13:53:40
- CNA-CVSS: **7.6** (`CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **total**

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 1c6f2bbec66007f1fed56b64a5b06a4e617409e2 (Commit)

## Referenzen

- <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>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-100833) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_