Vulnerability Description
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 Score
CRITICAL
Related Weaknesses (CWE)
References
- https://github.com/edgelesssys/contrast/security/advisories/GHSA-m2qg-wrxv-h898
- https://www.vulncheck.com/advisories/contrast-before-1.23.1-image-substitution-v
FAQ
What is CVE-2026-100833?
CVE-2026-100833 is a vulnerability with a CVSS score of 9.6 (CRITICAL). 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...
How severe is CVE-2026-100833?
CVE-2026-100833 has been rated CRITICAL with a CVSS base score of 9.6/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-100833?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.