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Vulnerability · Published Jul 1, 2026 · Assigned by GitHub_M

CVE-2026-46680containerd user ID handling bypass allows runAsNonRoot evasion

High 7.3

In plain English

A high-severity privilege mismanagement in containerd from containerd. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)7.3High
Exploit odds (30 days)0.2%top 94.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.24containerd2.3.1-r0ALPINE-CVE-2026-46680
Debian:12containerdno fix listedDEBIAN-CVE-2026-46680
Debian:13containerdno fix listedDEBIAN-CVE-2026-46680
Debian:14containerd2.1.9+ds1-1DEBIAN-CVE-2026-46680
Gogithub.com/containerd/containerd1.7.32GO-2026-5378
Gogithub.com/containerd/containerd1.7.32GHSA-fqw6-gf59-qr4w
Gogithub.com/containerd/containerd/v22.3.1GHSA-fqw6-gf59-qr4w
Gogithub.com/containerd/containerd/v22.0.9, 2.2.4, 2.3.1GO-2026-5378
Gogithub.com/containerd/containerd/v22.2.4GHSA-fqw6-gf59-qr4w
Gogithub.com/containerd/containerd/v22.0.9GHSA-fqw6-gf59-qr4w
Ubuntu:22.04:LTScontainerdno fix listedUBUNTU-CVE-2026-46680
Ubuntu:25.10containerdno fix listedUBUNTU-CVE-2026-46680
Ubuntu:26.10containerdno fix listedUBUNTU-CVE-2026-46680
Ubuntu:24.04:LTScontainerd-appno fix listedUBUNTU-CVE-2026-46680
Ubuntu:25.10containerd-appno fix listedUBUNTU-CVE-2026-46680
Ubuntu:26.04:LTScontainerd-appno fix listedUBUNTU-CVE-2026-46680
Ubuntu:26.10containerd-appno fix listedUBUNTU-CVE-2026-46680
Ubuntu:25.10containerd-stableno fix listedUBUNTU-CVE-2026-46680
Ubuntu:26.04:LTScontainerd-stableno fix listedUBUNTU-CVE-2026-46680
Ubuntu:26.10containerd-stableno fix listedUBUNTU-CVE-2026-46680

Affected products (as reported)

VendorProductVersions
containerd containerd < 1.7.32>= 2.0.4, < 2.0.9>= 2.0.10, < 2.2.4>= 2.2.5, < 2.3.1

Weakness: CWE-269 · Vector: 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

References