What is CVE-2021-20199?

CVE-2021-20199 is a medium-severity vulnerability in Podman Project, classified under Origin Validation Error. CVSS score: 5.9/10. Published 2021-02-02.

How severe is CVE-2021-20199?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Podman Project

CVE-2021-20199

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.

Published 2021-02-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.012 (67.1th percentile), scored 2026-11-01.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 67.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.012 · change: +0.000

Affected products

Podman Project
Podman — versions podman 1.8.0 onwards

Weakness classification (CWE)

CWE-346 — Origin Validation Error

References

bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
github.com/containers/podman/issues/5138 (Exploit, Third Party Advisory)
github.com/rootless-containers/rootlesskit/pull/206 (Patch, Third Party Advisory)
github.com/containers/podman/pull/9052 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-20199?: CVE-2021-20199 is a medium-severity vulnerability in Podman Project, classified under Origin Validation Error. CVSS score: 5.9/10. Published 2021-02-02.
How severe is CVE-2021-20199?: Medium severity. CVSS v3 base score is 5.9 out of 10.