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

Quick assessment

Affected
containerd containerd
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

containerd containerd是containerd团队的一款容器运行环境软件。 containerd存在权限许可和访问控制问题漏洞，该漏洞源于对无法解析为32位整数的数字User指令错误地视为用户名，导致runAsNonRoot绕过，如果特制镜像提供/etc/passwd文件将大数字字符串映射到root，容器最终以root权限运行，可能导致绕过Kubernetes runAsNonRoot限制。以下版本受到影响：1.7.32之前版本、2.0.9之前版本、2.2.4之前版本和2.3.1之前版本

AI Predicted 8.6 Difficulty: Easy EPSS 0.16% · P5

Possible ATT&CK Techniques 2 AI

T1610 · Deploy Container T1610.002

Affected Version Matrix 4

VendorProduct Version RangeStatus
containerd containerd < 1.7.32 affected
>= 2.0.4, < 2.0.9 affected
>= 2.0.10, < 2.2.4 affected
>= 2.2.5, < 2.3.1 affected
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I. Basic Information for CVE-2026-46680

Vulnerability Information
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Vulnerability Title
containerd user ID handling bypass allows runAsNonRoot evasion
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
containerd 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
containerd containerd是containerd团队的一款容器运行环境软件。 containerd存在权限许可和访问控制问题漏洞，该漏洞源于对无法解析为32位整数的数字User指令错误地视为用户名，导致runAsNonRoot绕过，如果特制镜像提供/etc/passwd文件将大数字字符串映射到root，容器最终以root权限运行，可能导致绕过Kubernetes runAsNonRoot限制。以下版本受到影响：1.7.32之前版本、2.0.9之前版本、2.2.4之前版本和2.3.1之前版本
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
containerd containerd < 1.7.32 -

II. Public POCs for CVE-2026-46680

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III. Intelligence Information for CVE-2026-46680

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Vendor Advisories for CVE-2026-46680 (1)

Same Patch Batch · containerd · 2026-07-01 · 6 CVEs total

CVE-2026-53488 containerd CRI plugin: — image-config `LABEL` flows to restart-monitor `binary://` logger:
CVE-2026-53489 containerd: Arbitrary host CRI log file read via symlink following in CRI checkpoint resto
CVE-2026-53492 containerd CRI checkpoint restore CDI annotation smuggling
CVE-2026-47262 containerd image-triggered runtime DoS via unbounded group parsing
CVE-2026-50195 containerd: CRI checkpoint import allows local image tag poisoning

IV. Related Vulnerabilities

Same product: containerd
Same vendor: containerd
Same weakness: CWE-269

V. Comments for CVE-2026-46680

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