High [CVE-2026-57231] Information disclosure via malicious container image environment variables

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. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

Weakness: CWE-914.

Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat OpenShift Container Platform 4.22; Red Hat Hardened Images; Red Hat Quay 3.10; Red Hat Quay 3.12; Red Hat Quay 3.14; Red Hat Quay 3.16; Red Hat Quay 3.9; Red Hat OpenShift Container Platform 4; Red Hat OpenShift Dev Spaces; Red Hat OpenStack Platform 18.0; Red Hat Quay 3.

Red Hat lists Red Hat Ansible Automation Platform 2; Red Hat Developer Hub; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat OpenShift Container Platform 4; Red Hat OpenShift Virtualization 4; Red Hat Trusted Profile Analyzer as not affected.