Input validation error in Podman - CVE-2026-57231
Published: June 29, 2026
Vulnerability identifier: #VU135854
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-57231
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Container Projects
Affected software:
Podman
Podman
Detailed vulnerability description
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to improper input validation in image config environment variable parsing when processing a malformed container image. A remote attacker can supply a specially crafted image to disclose sensitive information.
Environment variable entries containing only a key and no value, including wildcard forms such as an asterisk, may cause host environment variables from the launch session to be passed into the container.
How to mitigate CVE-2026-57231
Install security update from vendor's website.