7.5High
CVE-2026-57231Podman: Malformed Image can trick podman run into leaking host environment variables into the container
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.
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| podman project | podman | 1.8.1 – < 5.8.4 | |
| podman-container-tools | podman | >= 1.8.1, < 5.8.4 |
References and patches
CPE matches (NVD) (2)
cpe:2.3:a:podman_project:podman:*:*:*:*:*:*:*:*≥ 1.8.1 < 5.8.4cpe:2.3:a:podman_project:podman:6.0.0:rc1:*:*:*:*:*:*