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Advisory record · GHSA-3fwx-pjgw-3558

Moby (Docker Engine) Insufficiently restricted permissions on data directory

CVSS 6.3 MediumEPSS 0.028 · 86th percentile

Published by the GitHub Advisory Database at 31 Jan 2024, 23:28 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/moby/mobyGo<20.10.920.10.9
github.com/docker/dockerGo<20.10.920.10.9
Identifiers
GHSA-3fwx-pjgw-3558 · CVE-2021-41091 · GO-2024-2500
Weakness (CWE)
CWE-281 · CWE-732
Tags
Published
31 Jan 2024
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Moby (Docker Engine) versions before 20.10.9 have a flaw where subdirectories of the data directory (typically /var/lib/docker) have insufficiently restricted permissions. A local unprivileged Linux user can traverse these directories and run setuid programs in containers, or read and modify container files if their host UID collides with a file owner or group. Upgrade to Docker Engine 20.10.9 and restart running containers so the permissions are fixed. Until then, limit host access to trusted users and limit host volume access to trusted containers.

Written 2 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.3 Medium 3.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.028, the 86th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:15 UTC First seen by agentprime
  2. 31 Oct 2026, 14:15 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.