---
id: CVE-2026-93317
title: >-
  An unauthenticated attacker controlling a registry or OCI-layout blob source
  could provide blob contents that did not match the claimed digest
summary: >-
  An unauthenticated attacker controlling a registry or OCI-layout blob source
  could provide blob contents that did not match the claimed digest. The
  resulting snapshot could be cached under that digest and reused by a later
  victim build, …
severity: medium
cvss: 5.9
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:L/SA:N'
cwe:
  - CWE-354
vendor: moby
product: github.com/moby/buildkit
affected:
  - github.com/moby/buildkit >= 0.28.0 < 0.33.1
published: '2026-10-05'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T15:08:38.397'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93317'
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-p3rc-w3hc-pqvv'
    label: security@docker.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93317.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-93317'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2546011'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-93317'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93317'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-05T19:05:59.752463Z'
cvssSource: cna
scores:
  cna: 5.9
  vendor: 6.5
ingestedAt: '2026-10-05T18:29:11.202Z'
epss: 0.00162
epssPercentile: 0.05327
---

## Overview

An unauthenticated attacker controlling a registry or OCI-layout blob source could provide blob contents that did not match the claimed digest. The resulting snapshot could be cached under that digest and reused by a later victim build, compromising build-input integrity.

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Hardened Images · no fix planned: Red Hat Hardened Images · updated 2026-10-07 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93317.json)