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VulnerabilitiesOct 13, 2026

Docker Hub flaw let attackers impersonate users, tamper with images

Docker Hub flaw allowed attackers to impersonate users and tamper with images.

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Summary

A critical vulnerability (CVE-2026-105445) in Docker Hub allowed attackers to impersonate users and tamper with container images. Attackers could convert their account to an organization, name a target user as owner, and then use the target's personal access token (PAT) to access their repositories. This posed a software supply chain risk by enabling the publishing of malicious images under a legitimate name. Docker has since fixed the flaw and found no evidence of exploitation.

The lesson from this incident

Full lesson

A critical vulnerability in Docker Hub allowed attackers to hijack a target's identity by converting their own account into an organization, appointing the victim as owner, and then leveraging the victim's Personal Access Token (PAT) to publish malicious container images under a trusted name. This attack required no exploitation of the victim's credentials directly — only the structural flaw in how Docker Hub handled account-to-organization conversions and token scope. The supply chain implications are severe: developers and organizations consuming those images would have had no obvious indication that the images were tampered with. This incident underscores the danger of implicit trust placed in registry identities and the need to continuously validate the integrity of third-party software artifacts.

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Indicators of Compromise

  • cve — CVE-2026-105445

Entities

Docker Hub (product)container images (technology)personal access token (technology)software supply chain (technology)