---
id: CVE-2026-93320
title: >-
  BuildKit may be tricked into performing file actions with special file inodes
  where regular files are expected
summary: >-
  BuildKit may be tricked into performing file actions with special file inodes
  where regular files are expected. Special files may block operations or, on
  rootful workers, allow unintended host device access.
severity: medium
cvss: 6
cvssVector: 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:H/SA:H'
cwe:
  - CWE-441
vendor: moby
product: github.com/moby/buildkit
affected:
  - github.com/moby/buildkit <= 0.33.0
published: '2026-10-05'
updated: '2026-10-05'
sourceUpdated: '2026-10-05T19:17:26.177'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93320'
references:
  - url: 'https://github.com/moby/buildkit/releases/tag/v0.33.1'
    label: security@docker.com
  - url: 'https://github.com/moby/buildkit/security/advisories/GHSA-9728-qjrv-2xh2'
    label: security@docker.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-05T18:52:01.509494Z'
cvssSource: cna
ingestedAt: '2026-10-05T18:29:11.203Z'
---

## Overview

BuildKit may be tricked into performing file actions with special file inodes where regular files are expected. Special files may block operations or, on rootful workers, allow unintended host device access.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.