CVE-2021-41092Network attack vector

Credential disclosure via missing helper address

Published Oct 4, 2021 · Updated Aug 4, 2024

Credential disclosure in Docker CLI before 20.10.9 allows attackers to redirect private-registry credentials to Docker Hub during login. GetDefaultAuthConfig returned no authentication object when a configured credential helper failed, so runLogin created an empty object without the requested server address and used the default registry endpoint. The condition requires a user to run docker login for a private registry while credsStore or credHelpers names an unavailable executable; the bounded consequence is disclosure to registry-1.docker.io.

CVSS severity5.4
Medium
EPSS probability1.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Credential disclosure in Docker CLI before 20.10.9 allows attackers to redirect private-registry credentials to Docker Hub during login. GetDefaultAuthConfig returned no authentication object when a configured credential helper failed, so runLogin created an empty object without the requested server address and used the default registry endpoint. The condition requires a user to run docker login for a private registry while credsStore or credHelpers names an unavailable executable; the bounded consequence is disclosure to registry-1.docker.io.

The record

CVE
CVE-2021-41092
Published
Oct 4, 2021
Updated
Aug 4, 2024
Vendor
Docker
Product
Docker CLI
Classifications
CWE-200
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Oct 4, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=< 20.10.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Docker · Docker CLIversion=< 20.10.9

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.4GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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