How severe is CVE-2021-20199?

CVE-2021-20199 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2021-20199 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-20199?

CVE-2021-20199 affects Podman Project Podman. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-20199?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-20199 published?

CVE-2021-20199 was published on 2021-02-02 and last updated on 2026-06-17.

CVE-2021-20199

CVE-2021-20199 is a medium-severity vulnerability in Podman Project Podman with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-346.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v2: 4.3
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-346
Affected product: Podman Project Podman
Published: 2021-02-02
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2021-20199?: CVE-2021-20199 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2021-20199 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-20199?: CVE-2021-20199 affects Podman Project Podman. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-20199?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-20199 published?: CVE-2021-20199 was published on 2021-02-02 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:podman_project:podman:*:*:*:*:*:*:*:*

More vulnerabilities in Podman Project Podman

CVE-2022-1227 — High (CVSS 8.8): A privilege escalation flaw was found in Podman. This flaw allows an attacker to publish a malicious image to a public…
CVE-2026-33414 — High (CVSS 7.8): Podman is a tool for managing OCI containers and pods. Versions 4.8.0 through 5.8.1 contain a command injection…
CVE-2024-3056 — High (CVSS 7.7): A flaw was found in Podman. This issue may allow an attacker to create a specially crafted container that, when…
CVE-2026-57231 — High (CVSS 7.5): Podman is a tool for managing OCI containers and pods. From 1.8.1 until 5.8.4, a container image that contains a…
CVE-2022-2738 — High (CVSS 7.5): The version of podman as released for Red Hat Enterprise Linux 7 Extras via RHSA-2022:2190 advisory included an…
CVE-2022-27649 — High (CVSS 7.5): A flaw was found in Podman, where containers were started incorrectly with non-empty default permissions. A…

All CVEs affecting Podman Project Podman →

Other CWE-346 vulnerabilities

CVE-2026-42901 — Critical (CVSS 10.0): Origin validation error in Microsoft Entra ID allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-6508 — Critical (CVSS 9.8): Origin Validation Error vulnerability in TUBITAK BILGEM Software Technologies Research Institute Liderahenk allows…
CVE-2026-2790 — Critical (CVSS 9.8): Same-origin policy bypass in the Networking: JAR component. This vulnerability was fixed in Firefox 148, Firefox ESR…
CVE-2022-50925 — Critical (CVSS 9.8): Prowise Reflect version 1.0.9 contains a remote keystroke injection vulnerability that allows attackers to send…
CVE-2025-30466 — Critical (CVSS 9.8): This issue was addressed through improved state management. This issue is fixed in Safari 18.4, iOS 18.4 and iPadOS…
CVE-2024-8487 — Critical (CVSS 9.8): A Cross-Origin Resource Sharing (CORS) vulnerability exists in modelscope/agentscope version v0.0.4. The CORS…

Browse all CWE-346 vulnerabilities →