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Vulnerability record · CVE-2021-20188 · published 11 February 2021

CVE-2021-20188: Podman project podman incorrect authorization vulnerability

Podman Project · Podman

A flaw was found in podman before 1.7.0. File permissions for non-root users running in a privileged container are not correctly checked. This flaw can be abused by a low-privileged user inside the container to access any other file in the container, even if owned by the root user inside the container. It does not allow to directly escape the container, though being a privileged container means that a lot of security features are disabled when running the container. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

7.0 CVSS 3.1 High EPSS 0.26% · top 83.9% CWE-863 · Incorrect authorization
7.0CVSS 3.1 base score, v2 6.9
0.26%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

A flaw was found in podman before 1.7.0. File permissions for non-root users running in a privileged container are not correctly checked. This flaw can be abused by a low-privileged user inside the container to access any other file in the container, even if owned by the root user inside the container. It does not allow to directly escape the container, though being a privileged container means that a lot of security features are disabled when running the container. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.redhat.com/show_bug.cgi?id=1915734 Issue TrackingPatchVendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1915734 Issue TrackingPatchVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2021-20188), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.