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CVE-2026-57231— Podman: Malformed Image can trick podman run into leaking host environment variables into the container

Quick assessment

Affected
podman-container-tools podman
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Podman Container Tools Podman是Podman Container Tools组织开源的一款用于管理 OCI 容器和 Pod 的工具。 Podman Container Tools Podman 1.8.1版本至5.8.4版本存在安全漏洞，该漏洞源于容器镜像中仅包含键而无值的环境变量可能被传递到容器，且使用星号（*）会导致所有主机环境变量传递至容器，可能导致恶意镜像渗漏所有Podman环境变量。

CVSS 7.5 · High EPSS 0.44% · P36

Affected Version Matrix 1

VendorProduct Version RangeStatus
podman-container-tools podman >= 1.8.1, < 5.8.4 affected
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I. Basic Information for CVE-2026-57231

Vulnerability Information
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Vulnerability Title
Podman: Malformed Image can trick podman run into leaking host environment variables into the container
Source: CVE Program / CVE List V5
Vulnerability Description
Podman is a tool for managing OCI containers and pods. From 1.8.1 until 5.8.4, a container image that contains a environment variable with just a key and no value can trick podman into passing that variable from the host into the container. This is made worse by the fact that using an asterisk (*) will cause podman to pass all host variables into the container. So essentially a malicious image can exfiltrate all podman environment variables that are set in the session from where the container is launched. This vulnerability is fixed in 5.8.4 and 6.0.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Podman Container Tools Podman 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Podman Container Tools Podman是Podman Container Tools组织开源的一款用于管理 OCI 容器和 Pod 的工具。 Podman Container Tools Podman 1.8.1版本至5.8.4版本存在安全漏洞，该漏洞源于容器镜像中仅包含键而无值的环境变量可能被传递到容器，且使用星号（*）会导致所有主机环境变量传递至容器，可能导致恶意镜像渗漏所有Podman环境变量。
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
podman-container-tools podman >= 1.8.1, < 5.8.4 -

II. Public POCs for CVE-2026-57231

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9813 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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Trigger conditions & impact
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III. Intelligence Information for CVE-2026-57231

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Patches & Fixes for CVE-2026-57231 (1)

Vendor Advisories for CVE-2026-57231 (1)

IV. Related Vulnerabilities

Same product: podman
Same vendor: podman-container-tools
Same weakness: CWE-200

V. Comments for CVE-2026-57231

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