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BuildKit vulnerable to malicious frontend causing file escape outside of storage root

CVSS 3.1 8.4 HIGHEUVD CVSS 3.1 8.4 CVSS 3.1 · [email protected] · Secondary 8.4 HIGHCVSS 3.1 · [email protected] · Primary 9.8 CRITICALCVSS_V3 Publisher rating HIGHFixed by github.com/moby/buildkit 0.28.1osv · severity unknownFixed by github.com/moby/buildkit 0.28.1KEV status unknown

cve-program · CVE-2026-33747

Published

BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to version 0.28.1, when using a custom BuildKit frontend, the frontend can craft an API message that causes files to be written outside of the BuildKit state directory for the execution context. The issue has been fixed in v0.28.1. The vulnerability requires using an untrusted BuildKit frontend set with `#syntax` or `--build-arg BUILDKIT_SYNTAX`. Using these options with a well-known frontend image like `docker/dockerfile` is not affected.

Read the publisher's advisory

euvd · EUVD-2026-16518

Published

BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to version 0.28.1, when using a custom BuildKit frontend, the frontend can craft an API message that causes files to be written outside of the BuildKit state directory for the execution context. The issue has been fixed in v0.28.1. The vulnerability requires using an untrusted BuildKit frontend set with `#syntax` or `--build-arg BUILDKIT_SYNTAX`. Using these options with a well-known frontend image like `docker/dockerfile` is not affected.

Read the publisher's advisory

nvd · CVE-2026-33747

Published

BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to version 0.28.1, when using a custom BuildKit frontend, the frontend can craft an API message that causes files to be written outside of the BuildKit state directory for the execution context. The issue has been fixed in v0.28.1. The vulnerability requires using an untrusted BuildKit frontend set with `#syntax` or `--build-arg BUILDKIT_SYNTAX`. Using these options with a well-known frontend image like `docker/dockerfile` is not affected.

Read the publisher's advisory

osv · GHSA-4c29-8rgm-jvjj

Published

### Impact When using a custom BuildKit frontend, the frontend can craft an API message that causes files to be written outside of the BuildKit state directory for the execution context. ### Patches The issue has been fixed in v0.28.1+ ### Workarounds Issue requires using an untrusted BuildKit frontend set with `#syntax` or `--build-arg BUILDKIT_SYNTAX`. Using these options with a well-known frontend image like `docker/dockerfile` is not affected.

Read the publisher's advisory

osv · GO-2026-4858

Published

BuildKit's Malicious frontend can cause file escape outside of storage root in github.com/moby/buildkit

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-33747

Published

buildkit

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "moby",
                    "product": "buildkit",
                    "versions": [
                        {
                            "version": "< 0.28.1",
                            "status": "affected"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON

euvd · EUVD-2026-16518

Published

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Mar 27, 2026, 12:49:06 AM

dateUpdated: Mar 27, 2026, 7:59:06 PM

26 related source bulletins · separate from aliases

RHSA-2026:9440: Red Hat Security Advisory: Red Hat OpenShift Service Mesh 3.0.10

CVE-2026-25679 · CVE-2026-33186 · CVE-2026-33747 · CVE-2026-33748

openSUSE-SU-2026:10472-1: conftest-0.67.1-2.1 on GA media

CVE-2026-33747

openSUSE-SU-2026:11075-1: docker-stable-24.0.9_ce-18.1 on GA media

CVE-2026-33186 · CVE-2026-33747 · CVE-2026-33748 · CVE-2026-33814 · CVE-2026-33997 · CVE-2026-34040 · CVE-2026-39821 · CVE-2026-41567

RHSA-2026:57013: Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.20.17 security, enhancement & bug fix update

CVE-2025-61726 · CVE-2026-6321 · CVE-2026-6322 · CVE-2026-6734 · CVE-2026-9697 · CVE-2026-12143 · CVE-2026-12151 · CVE-2026-13149 · CVE-2026-13676 · CVE-2026-25681 · CVE-2026-27136 · CVE-2026-33186 · CVE-2026-33747 · CVE-2026-33748 · CVE-2026-34986 · CVE-2026-44740 · CVE-2026-45736 · CVE-2026-48779 · CVE-2026-53488 · CVE-2026-53489 · CVE-2026-53492 · CVE-2026-59869

RHSA-2026:51033: Red Hat Security Advisory: Red Hat OpenShift API for Data Protection

CVE-2024-25621 · CVE-2025-61726 · CVE-2025-61728 · CVE-2025-61729 · CVE-2025-66506 · CVE-2025-68121 · CVE-2026-25681 · CVE-2026-27136 · CVE-2026-32280 · CVE-2026-32281 · CVE-2026-32282 · CVE-2026-33186 · CVE-2026-33747 · CVE-2026-33748 · CVE-2026-33810 · CVE-2026-33811 · CVE-2026-34986 · CVE-2026-39820 · CVE-2026-39821 · CVE-2026-39828 · CVE-2026-39829 · CVE-2026-39830 · CVE-2026-39831 · CVE-2026-39835 · CVE-2026-42306 · CVE-2026-42499 · CVE-2026-42508 · CVE-2026-44740 · CVE-2026-46595 · CVE-2026-46597 · CVE-2026-53488 · CVE-2026-53492

RHSA-2026:37387: Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.22.0 security, enhancement & bug fix update

CVE-2024-25621 · CVE-2024-40635 · CVE-2024-45310 · CVE-2025-8766 · CVE-2025-21613 · CVE-2025-21614 · CVE-2025-22870 · CVE-2025-47911 · CVE-2025-52881 · CVE-2025-54410 · CVE-2025-58058 · CVE-2025-64329 · CVE-2025-66506 · CVE-2026-22772 · CVE-2026-23831 · CVE-2026-24117 · CVE-2026-25680 · CVE-2026-25681 · CVE-2026-25934 · CVE-2026-27136 · CVE-2026-27141 · CVE-2026-27903 · CVE-2026-33540 · CVE-2026-33747 · CVE-2026-33748 · CVE-2026-33814 · CVE-2026-34986 · CVE-2026-35172 · CVE-2026-35469 · CVE-2026-39821 · CVE-2026-39827 · CVE-2026-39828 · CVE-2026-39829 · CVE-2026-39830 · CVE-2026-39831 · CVE-2026-39832 · CVE-2026-39833 · CVE-2026-39834 · CVE-2026-39835 · CVE-2026-39883 · CVE-2026-41506 · CVE-2026-41567 · CVE-2026-41568 · CVE-2026-42502 · CVE-2026-42506 · CVE-2026-42508 · CVE-2026-44740 · CVE-2026-45571 · CVE-2026-46595 · CVE-2026-46597 · CVE-2026-46598

SUSE-SU-2026:2120-1: Security update for docker-stable

CVE-2026-33747 · CVE-2026-33748

openSUSE-SU-2026:20809-1: Security update for trivy

CVE-2025-64702 · CVE-2025-69725 · CVE-2026-25934 · CVE-2026-33186 · CVE-2026-33747 · CVE-2026-33748 · CVE-2026-34986 · CVE-2026-39984 · CVE-2026-41506

openSUSE-SU-2026:10456-1: tailscale-1.96.4-1.1 on GA media

CVE-2026-33747

RHSA-2026:10125: Red Hat Security Advisory: RHTAS 1.3.4 - Red Hat Trusted Artifact Signer Release

CVE-2025-68121 · CVE-2026-25679 · CVE-2026-27137 · CVE-2026-33186 · CVE-2026-33211 · CVE-2026-33747 · CVE-2026-33748 · CVE-2026-34986

openSUSE-SU-2026:10651-1: trivy-0.70.0-1.1 on GA media

CVE-2025-69725 · CVE-2026-25934 · CVE-2026-33186 · CVE-2026-33747 · CVE-2026-33748 · CVE-2026-34986 · CVE-2026-39984

RHSA-2026:26568: Red Hat Security Advisory: Red Hat OpenShift API for Data Protection

CVE-2026-25679 · CVE-2026-27137 · CVE-2026-32280 · CVE-2026-32281 · CVE-2026-32282 · CVE-2026-33186 · CVE-2026-33747 · CVE-2026-33748 · CVE-2026-33810 · CVE-2026-34986

openSUSE-SU-2026:20814-1: Security update for docker-stable

CVE-2026-33747 · CVE-2026-33748

openSUSE-SU-2026:22203-1: Security update for tailscale

CVE-2026-33747

SUSE-SU-2026:21851-1: Security update for docker-stable

CVE-2026-33747 · CVE-2026-33748

RHSA-2026:9453: Red Hat Security Advisory: Red Hat OpenShift Service Mesh 3.2.4

CVE-2026-25679 · CVE-2026-33186 · CVE-2026-33747 · CVE-2026-33748 · CVE-2026-34986

RHSA-2026:46885: Red Hat Security Advisory: multicluster engine for Kubernetes v2.10.4 security update

CVE-2025-58183 · CVE-2026-16242 · CVE-2026-17107 · CVE-2026-33747 · CVE-2026-33748 · CVE-2026-33811 · CVE-2026-34986 · CVE-2026-39828 · CVE-2026-39829 · CVE-2026-39830 · CVE-2026-39835 · CVE-2026-42508 · CVE-2026-44486 · CVE-2026-44487 · CVE-2026-44488 · CVE-2026-44492 · CVE-2026-44494 · CVE-2026-44495 · CVE-2026-44496 · CVE-2026-44740 · CVE-2026-44990 · CVE-2026-59869

SUSE-SU-2026:2578-1: Security update for docker-stable

CVE-2026-33747 · CVE-2026-33748 · CVE-2026-33997 · CVE-2026-34040

WID-SEC-W-2026-0873: docker: Mehrere Schwachstellen

CVE-2026-33747 · CVE-2026-33748 · CVE-2026-33997 · CVE-2026-34040

RHSA-2026:22465: Red Hat Security Advisory: Red Hat Quay 3.17.2

CVE-2025-62718 · CVE-2026-4427 · CVE-2026-27459 · CVE-2026-29063 · CVE-2026-29074 · CVE-2026-32280 · CVE-2026-32281 · CVE-2026-32282 · CVE-2026-32286 · CVE-2026-32589 · CVE-2026-32590 · CVE-2026-33186 · CVE-2026-33747 · CVE-2026-33894 · CVE-2026-34986 · CVE-2026-39892 · CVE-2026-40192 · CVE-2026-40895 · CVE-2026-42033 · CVE-2026-42035 · CVE-2026-42039 · CVE-2026-42041 · CVE-2026-42043 · CVE-2026-42044 · CVE-2026-44486 · CVE-2026-44487 · CVE-2026-44488 · CVE-2026-44492 · CVE-2026-44494 · CVE-2026-44495 · CVE-2026-44496

RHSA-2026:9448: Red Hat Security Advisory: Red Hat OpenShift Service Mesh 3.1.7

CVE-2026-25679 · CVE-2026-33186 · CVE-2026-33747 · CVE-2026-33748 · CVE-2026-34986

RHSA-2026:70267: Red Hat Security Advisory: Red Hat Quay 3.14.9

CVE-2026-4427 · CVE-2026-6322 · CVE-2026-9277 · CVE-2026-10143 · CVE-2026-12143 · CVE-2026-13149 · CVE-2026-13676 · CVE-2026-14257 · CVE-2026-15792 · CVE-2026-15927 · CVE-2026-16221 · CVE-2026-18255 · CVE-2026-32591 · CVE-2026-33747 · CVE-2026-33748 · CVE-2026-33818 · CVE-2026-39820 · CVE-2026-39821 · CVE-2026-39822 · CVE-2026-39828 · CVE-2026-39829 · CVE-2026-39830 · CVE-2026-39831 · CVE-2026-39832 · CVE-2026-39835 · CVE-2026-42151 · CVE-2026-42154 · CVE-2026-42499 · CVE-2026-42504 · CVE-2026-42508 · CVE-2026-44432 · CVE-2026-44486 · CVE-2026-44487 · CVE-2026-44488 · CVE-2026-44492 · CVE-2026-44494 · CVE-2026-44495 · CVE-2026-44496 · CVE-2026-44705 · CVE-2026-44990 · CVE-2026-46595 · CVE-2026-46597 · CVE-2026-48526 · CVE-2026-49477 · CVE-2026-54058 · CVE-2026-54060 · CVE-2026-55379 · CVE-2026-55380 · CVE-2026-56852 · CVE-2026-56853 · CVE-2026-56858 · CVE-2026-56859 · CVE-2026-56860 · CVE-2026-56862 · CVE-2026-57231 · CVE-2026-59197 · CVE-2026-59199 · CVE-2026-59200 · CVE-2026-59204 · CVE-2026-59205 · CVE-2026-59869 · CVE-2026-59885 · CVE-2026-59886 · CVE-2026-67213 · CVE-2026-67214 · CVE-2026-67313 · CVE-2026-67314 · CVE-2026-67320 · CVE-2026-67321 · CVE-2026-69152 · CVE-2026-69153 · CVE-2026-73086 · CVE-2026-73088 · CVE-2026-73089 · CVE-2026-84375

RHSA-2026:42644: Red Hat Security Advisory: RHOAI 2.25.9 - Red Hat OpenShift AI

CVE-2024-12224 · CVE-2025-14920 · CVE-2025-14921 · CVE-2025-14924 · CVE-2025-14926 · CVE-2025-14927 · CVE-2025-14928 · CVE-2025-14929 · CVE-2025-14930 · CVE-2025-69227 · CVE-2025-69228 · CVE-2026-5241 · CVE-2026-8643 · CVE-2026-11816 · CVE-2026-22773 · CVE-2026-22807 · CVE-2026-23490 · CVE-2026-24486 · CVE-2026-24779 · CVE-2026-25048 · CVE-2026-25681 · CVE-2026-25960 · CVE-2026-25990 · CVE-2026-27136 · CVE-2026-27145 · CVE-2026-27893 · CVE-2026-28356 · CVE-2026-28684 · CVE-2026-32281 · CVE-2026-32283 · CVE-2026-32597 · CVE-2026-32981 · CVE-2026-33186 · CVE-2026-33236 · CVE-2026-33699 · CVE-2026-33747 · CVE-2026-33811 · CVE-2026-33814 · CVE-2026-34478 · CVE-2026-34480 · CVE-2026-34993 · CVE-2026-39820 · CVE-2026-39821 · CVE-2026-39892 · CVE-2026-42499 · CVE-2026-42504 · CVE-2026-42578 · CVE-2026-42581 · CVE-2026-42584 · CVE-2026-42587 · CVE-2026-43868 · CVE-2026-43869 · CVE-2026-44431 · CVE-2026-44432 · CVE-2026-44660 · CVE-2026-48526 · CVE-2026-48746 · CVE-2026-54293

RHSA-2026:30650: Red Hat Security Advisory: multicluster engine for Kubernetes v2.8.8 security update

CVE-2025-47914 · CVE-2025-58183 · CVE-2026-33747 · CVE-2026-33748 · CVE-2026-34986 · CVE-2026-35206 · CVE-2026-39821 · CVE-2026-44486 · CVE-2026-44487 · CVE-2026-44488 · CVE-2026-44492 · CVE-2026-44494 · CVE-2026-44495 · CVE-2026-44496 · CVE-2026-46595

RHSA-2026:47388: Red Hat Security Advisory: multicluster engine for Kubernetes v2.10.4 security update

CVE-2025-58183 · CVE-2026-16242 · CVE-2026-17107 · CVE-2026-33747 · CVE-2026-33748 · CVE-2026-33811 · CVE-2026-34986 · CVE-2026-39828 · CVE-2026-39829 · CVE-2026-39830 · CVE-2026-39835 · CVE-2026-42508 · CVE-2026-44486 · CVE-2026-44487 · CVE-2026-44488 · CVE-2026-44492 · CVE-2026-44494 · CVE-2026-44495 · CVE-2026-44496 · CVE-2026-44740 · CVE-2026-44990 · CVE-2026-59869

RHSA-2026:29854: Red Hat Security Advisory: Red Hat OpenShift API for Data Protection

CVE-2025-68121 · CVE-2026-25679 · CVE-2026-27137 · CVE-2026-32280 · CVE-2026-32281 · CVE-2026-32282 · CVE-2026-33186 · CVE-2026-33747 · CVE-2026-33748 · CVE-2026-33810 · CVE-2026-34986

No normalized affected-package data is projected for this source revision. The original publisher record may contain additional product and version evidence; this does not establish that a package is unaffected.

Original source record · Cite this exact observation · Complete original publisher JSON

nvd · CVE-2026-33747

Published

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Analyzed

Weakness classifications: CWE-22

Original publisher date fields

published: 2026-03-27T01:16:21.330

lastModified: 2026-06-17T10:38:01.807

1 source CPE criteria · context only
  • cpe:2.3:a:mobyproject:buildkit:*:*:*:*:*:*:*:*

The original JSON retains the logical configuration operators, exclusions and version bounds.

No normalized affected-package data is projected for this source revision. The original publisher record may contain additional product and version evidence; this does not establish that a package is unaffected.

Original source record · Cite this exact observation · Complete original publisher JSON

osv · GHSA-4c29-8rgm-jvjj

Published

github.com/moby/buildkit

Go

SEMVER · introduced 0 → fixed 0.28.1

Original source record · Cite this exact observation · Complete original publisher JSON

osv · GO-2026-4858

Published

github.com/moby/buildkit

Go

SEMVER · introduced 0 → fixed 0.28.1

Original source record · Cite this exact observation · Complete original publisher JSON

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 15 Nov 12:11 UTC · 256 of 275 readable · 252 fully read · documentation 469/469 current