CVE-2026-46680: high-severity vulnerability in containerd
containerd user ID handling bypass allows runAsNonRoot evasion
Published · Updated
41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 7.3epss 0.2%
from disclosure to weapon0 days
Published on NVDJul 1
1st PoCMay 21
exploitation probability
0.2%top 95% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
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:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
containerd · containerdpublic PoCs found — 1
githubgithub.com/r0binak/CVE-2026-46680★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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