Vulnerability Description
containerd is an open-source container runtime. In versions prior to 1.7.32, 2.0.9, 2.2.4 and 2.3.1, containers launched with a numeric User directive that cannot be parsed as a 32-bit integer are incorrectly treated as a username, leading to runAsNonRoot evasion. If a crafted image provides an /etc/passwd file mapping this large numeric string to root, the container ultimately runs as root (UID 0). This allows the Kubernetes runAsNonRoot restriction to be bypassed, causing unexpected behavior for environments that require containers to run as a non-root user. This issue has been fixed in versions 1.7.32, 2.0.9, 2.2.4 and 2.3.1.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linuxfoundation | Containerd | >= 1.7.27, < 1.7.32 |
Related Weaknesses (CWE)
References
- https://github.com/containerd/containerd/security/advisories/GHSA-fqw6-gf59-qr4wMitigationVendor Advisory
FAQ
What is CVE-2026-46680?
CVE-2026-46680 is a vulnerability with a CVSS score of 7.8 (HIGH). containerd is an open-source container runtime. In versions prior to 1.7.32, 2.0.9, 2.2.4 and 2.3.1, containers launched with a numeric User directive that cannot be parsed as a 32-bit integer are inc...
How severe is CVE-2026-46680?
CVE-2026-46680 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-46680?
Check the references section above for vendor advisories and patch information. Affected products include: Linuxfoundation Containerd.