CVE-2026-56857 Affecting containerd-2.1 package, versions <2.1.9-r17
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CHAINGUARDLATEST-CONTAINERD21-20744012
- published10 Oct 2026
- disclosed8 Oct 2026
Introduced: 8 Oct 2026
NewCVE-2026-56857 (opens in a new tab)How to fix?
Upgrade Chainguard containerd-2.1 to version 2.1.9-r17 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream containerd-2.1 package and not the containerd-2.1 package as distributed by Chainguard.
See How to fix? for Chainguard relevant fixed versions and status.
On Windows, when the target of Root.Mkdir or Root.MkdirAll is a junction pointing to an empty location, the operation can create a directory at the junction target even when that target is located outside the root. This only applies to operations where the last path component is a junction (path/to/junction, but not path/junction/target).