What’s Vulnerable › Vulnerabilities

CVE-2021-41092: Docker CLI leaks private registry credentials to registry-1.docker.io

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-10-04 · updated 2026-06-17
• Weakness: CWE-200

Description

Docker CLI is the command line interface for the docker container runtime. A bug was found in the Docker CLI where running `docker login my-private-registry.example.com` with a misconfigured configuration file (typically `~/.docker/config.json`) listing a `credsStore` or `credHelpers` that could not be executed would result in any provided credentials being sent to `registry-1.docker.io` rather than the intended private registry. This bug has been fixed in Docker CLI 20.10.9. Users should update to this version as soon as possible. For users unable to update ensure that any configured credsStore or credHelpers entries in the configuration file reference an installed credential helper that is executable and on the PATH.

Affected products

• Docker Command Line Interface: before 20.10.9 — fixed in 20.10.9
• Fedoraproject Fedora: 34, 35

How to fix

Upgrade to a fixed version: Docker Command Line Interface 20.10.9. Check the vendor advisory for mitigations.

References

• https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf
• https://github.com/docker/cli/commit/893e52cf4ba4b048d72e99748e0f86b2767c6c6b
• https://github.com/docker/cli/security/advisories/GHSA-99pg-grm5-qq3v
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B5Q6G6I4W5COQE25QMC7FJY3I3PAYFBB/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNFADTCHHYWVM6W4NJ6CB4FNFM2VMBIB/
• https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf
• https://github.com/docker/cli/commit/893e52cf4ba4b048d72e99748e0f86b2767c6c6b
• https://github.com/docker/cli/security/advisories/GHSA-99pg-grm5-qq3v
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B5Q6G6I4W5COQE25QMC7FJY3I3PAYFBB/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNFADTCHHYWVM6W4NJ6CB4FNFM2VMBIB/

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