CVE-2021-20199

Name: CVE-2021-20199
Creator: NVD / NIST
Published: 2021-02-02T19:15:14+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.9/10EPSS 1.10%

Last modified Jun 17, 2026

CVE-2021-20199 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. Rootless containers run with Podman, receive all traffic with a source IP address of 127.0.0.1 (including from remote hosts). This impacts containerized applications that trust localhost (127.0.01) connections by default and do not require authentication. EPSS estimates a 1.10% chance of exploitation in the next 30 days.

Description

Rootless containers run with Podman, receive all traffic with a source IP address of 127.0.0.1 (including from remote hosts). This impacts containerized applications that trust localhost (127.0.01) connections by default and do not require authentication. This issue affects Podman 1.8.0 onwards.

Metrics

CVSS 3.1

5.9/10

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

EPSS Probability

1.10%

61.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-346

Affected Software

Vendor	Product	Versions
Podman Project	Podman	>= 1.8.0, < 3.0.0

References

https://bugzilla.redhat.com/show_bug.cgi?id=1919050Issue Tracking, Third Party Advisory
https://github.com/containers/podman/issues/5138Exploit, Third Party Advisory
https://github.com/containers/podman/pull/9052Patch, Third Party Advisory
https://github.com/rootless-containers/rootlesskit/pull/206Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1919050Issue Tracking, Third Party Advisory
https://github.com/containers/podman/issues/5138Exploit, Third Party Advisory
https://github.com/containers/podman/pull/9052Patch, Third Party Advisory
https://github.com/rootless-containers/rootlesskit/pull/206Patch, Third Party Advisory

Timeline

Published: Feb 2, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-20199?

How severe is CVE-2021-20199?

CVE-2021-20199 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 1.10% probability of exploitation in the next 30 days.

How do I fix CVE-2021-20199?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-20199?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST