high7.5
CVE-2026-57231
Podman: Malformed Image can trick podman run into leaking host environment variables into the container
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/containers/podman/v5 | < 5.8.4 | 5.8.4 |
| go | go.podman.io/podman/v6 | < 6.0.0 | 6.0.0 |
| go | github.com/containers/podman/v4 | <= 4.9.5 | none recorded |
| go | github.com/containers/podman/v3 | <= 3.4.7 | none recorded |
| go | github.com/containers/podman/v2 | <= 2.2.1 | none recorded |
| go | github.com/containers/podman | >= 1.8.1, < 5.8.4 | none recorded |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Podman Project | Podman | from 1.8.1 before 5.8.4 Version 6.0.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-4hq8-gpf5-8p68
- https://github.com/podman-container-tools/podman/security/advisories/GHSA-4hq8-gpf5-8p68
- https://nvd.nist.gov/vuln/detail/CVE-2026-57231
- https://github.com/podman-container-tools/podman/commit/6c431b73dbf8e4b20b778644d7a80caebdb75050
- https://github.com/podman-container-tools/podman/releases/tag/v5.8.4
- https://github.com/podman-container-tools/podman/releases/tag/v6.0.0