critical
CVE-2026-33747
BuildKit: github.com/moby/buildkit: BuildKit: Arbitrary file write and code execution via untrusted frontend
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.
Severity by source
NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GHSA8.4CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat8.2CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by GHSA (high), Red Hat (medium), Ubuntu (medium).
Description
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.
Affected packages and fixed versions
| Source | Package | Fixed in |
|---|---|---|
| alpine 3.23 | docker | 29.3.1-r0 |
| alpine 3.24 | buildkit, docker | 0.29.0-r0 and 1 more |
| alpine edge | buildkit, docker | 0.29.0-r0 and 1 more |
| chainguard | buildah, buildah-fips, cloudbeat-8.19 and 31 more | 1.44.0-r0 and 27 more |
| debian 11 | docker.io | no fix listed |
| debian 12 | docker.io | no fix listed |
| debian 13 | docker.io | 26.1.5+dfsg1-9+deb13u1 |
| debian 14 | docker.io | 28.5.2+dfsg4-3 |
| echo | docker.io | 26.1.5+dfsg1-9+deb13u1 |
| go::GitHub Security Advisory Go | github.com/moby/buildkit | 0.28.1 |
| minimos | buildah, buildah-fips, buildpacks-lifecycle-0.20 and 16 more | 1.44.1-r0 and 10 more |
| rapidfort alpine 3.20 | buildkit, docker | 0.29.0-r0 and 1 more |
Show all 116 entries from 31 sources
| Source | Package | Fixed in |
|---|---|---|
| alpine 3.23 | docker | 29.3.1-r0 |
| alpine 3.24 | buildkit | 0.29.0-r0 |
| alpine 3.24 | docker | 29.3.1-r0 |
| alpine edge | buildkit | 0.29.0-r0 |
| alpine edge | docker | 29.3.1-r0 |
| chainguard | buildah | 1.44.0-r0 |
| chainguard | buildah-fips | 1.44.0-r0 |
| chainguard | cloudbeat-8.19 | 8.19.13-r2 |
| chainguard | cloudbeat-9.2 | 9.2.7-r2 |
| chainguard | cloudbeat-9.3 | 9.3.2-r1 |
| chainguard | cloudbeat-fips-8.19 | 8.19.13-r1 |
| chainguard | cloudbeat-fips-9.2 | 9.2.7-r3 |
| chainguard | cloudbeat-fips-9.3 | 9.3.2-r2 |
| chainguard | conftest | 0.67.1-r2 |
| chainguard | conftest-fips | 0.67.1-r1 |
| chainguard | docker-cli-buildx | 0.32.1-r3 |
| chainguard | docker-cli-buildx-fips | 0.32.1-r3 |
| chainguard | docker-compose | 5.1.1-r1 |
| chainguard | docker-compose-fips | 5.1.1-r1 |
| chainguard | docker-fips-29 | 29.5.2-r0 |
| chainguard | guac | 1.1.0-r2 |
| chainguard | kaniko | 1.25.12-r1 |
| chainguard | kaniko-fips | 1.25.12-r1 |
| chainguard | kubescape | 4.0.5-r0 |
| chainguard | kubescape-server | 4.0.3-r2 |
| chainguard | kubescape-server-fips | 4.0.3-r2 |
| chainguard | livekit-cli | 2.16.0-r4 |
| chainguard | osv-scanner | 2.3.6-r0 |
| chainguard | podman | 6.0.0-r0 |
| chainguard | podman-fips | 6.0.0-r0 |
| chainguard | podman-fips-5.8 | 0 |
| chainguard | scorecard | 5.4.0-r15 |
| chainguard | skaffold | 2.18.2-r1 |
| chainguard | skaffold-fips | 2.18.2-r0 |
| chainguard | trivy | 0.69.3-r6 |
| chainguard | trivy-fips | 0.69.3-r4 |
| chainguard | trivy-operator | 0.30.1-r4 |
| chainguard | trivy-operator-fips | 0.30.1-r3 |
| chainguard | zot | 2.1.15-r4 |
| debian 11 | docker.io | no fix listed |
| debian 12 | docker.io | no fix listed |
| debian 13 | docker.io | 26.1.5+dfsg1-9+deb13u1 |
| debian 14 | docker.io | 28.5.2+dfsg4-3 |
| echo | docker.io | 26.1.5+dfsg1-9+deb13u1 |
| go::GitHub Security Advisory Go | github.com/moby/buildkit | 0.28.1 |
| minimos | buildah | 1.44.1-r0 |
| minimos | buildah-fips | 1.44.1-r0 |
| minimos | buildpacks-lifecycle-0.20 | 0.20.20-r6 |
| minimos | buildpacks-lifecycle-fips-0.20 | 0.20.20-r5 |
| minimos | conftest | 0.67.1-r1 |
| minimos | conftest-fips | 0.67.1-r1 |
| minimos | datadog-agent | 7.65.1-r0 |
| minimos | docker-25 | 25.0.17-r0 |
| minimos | docker-29 | 29.3.1-r0 |
| minimos | docker-cli-buildx | 0.32.1-r2 |
| minimos | docker-cli-buildx-fips | 0.32.1-r2 |
| minimos | docker-compose | 5.1.1-r2 |
| minimos | docker-compose-fips | 5.1.1-r2 |
| minimos | docker-fips-25 | 25.0.17-r0 |
| minimos | docker-fips-29 | 29.3.1-r0 |
| minimos | livekit-cli | 2.16.0-r3 |
| minimos | livekit-cli-fips | 2.16.0-r3 |
| minimos | podman | 6.0.0-r0 |
| minimos | podman-fips | 6.0.0-r0 |
| rapidfort alpine 3.20 | buildkit | 0.29.0-r0 |
| rapidfort alpine 3.20 | docker | 29.3.1-r0 |
| rapidfort alpine 3.21 | buildkit | 0.29.0-r0 |
| rapidfort alpine 3.21 | docker | 29.3.1-r0 |
| rapidfort alpine 3.22 | buildkit | 0.29.0-r0 |
| rapidfort alpine 3.22 | docker | 29.3.1-r0 |
| rapidfort alpine 3.23 | buildkit | 0.29.0-r0 |
| rapidfort alpine 3.23 | docker | 29.3.1-r0 |
| rapidfort alpine 3.24 | buildkit | 0.29.0-r0 |
| rapidfort debian 12 | docker.io | 0:26.1.5+dfsg1-9+deb13u1, 0:28.5.2+dfsg4-3 |
| rapidfort debian 13 | docker.io | 0:26.1.5+dfsg1-9+deb13u1, 0:28.5.2+dfsg4-3 |
| rapidfort fedora 43 | docker-compose | 5.1.3-1.fc43 |
| rapidfort fedora 43 | doctl | 1.154.0-1.fc43 |
| rapidfort fedora 43 | moby-engine | 29.3.1-1.fc43 |
| rapidfort fedora 43 | moby-engine-nano | 29.3.1-1.fc43 |
| rapidfort fedora 43 | moby-filesystem | 29.3.1-1.fc43 |
| rapidfort fedora 43 | moby-rpm-macros | 29.3.1-1.fc43 |
| rapidfort ubuntu 20.04 | docker.io | 0:24.0.7-0ubuntu4 |
| rapidfort ubuntu 22.04 | docker.io | 0:24.0.7-0ubuntu4 |
| rapidfort ubuntu 24.04 | docker.io | 0:24.0.7-0ubuntu4 |
| Red Hat | openshift-kni/commatrix | no fix listed |
| Red Hat | openshift4/cnf-tests-rhel8 | no fix listed |
| Red Hat | openshift4/cnf-tests-rhel9 | no fix listed |
| Red Hat | openshift4/kube-compare-artifacts-rhel9 | no fix listed |
| Red Hat | openshift4/numaresources-must-gather-rhel9 | no fix listed |
| Red Hat | openshift4/ose-secrets-store-csi-mustgather-rhel9 | no fix listed |
| root.io debian 12 | rootio-docker.io | no fix listed |
| ubuntu 18.04-ESM | docker.io | no fix listed |
| ubuntu 20.04-ESM | docker.io | no fix listed |
| ubuntu 20.04-ESM | docker.io-app | 26.1.3-0ubuntu1~20.04.1+esm2 |
| ubuntu 22.04 | docker.io | no fix listed |
| ubuntu 22.04 | docker.io-app | 29.1.3-0ubuntu3~22.04.2 |
| ubuntu 24.04 | docker.io | no fix listed |
| ubuntu 24.04 | docker.io-app | 29.1.3-0ubuntu3~24.04.2 |
| ubuntu 26.04 | docker.io | no fix listed |
| ubuntu 26.04 | docker.io-app | 29.1.3-0ubuntu4.1 |
| ubuntu 26.10 | docker.io | no fix listed |
| ubuntu 26.10 | docker.io-app | 29.1.3-0ubuntu5 |
| wolfi | buildah | 1.44.0-r0 |
| wolfi | conftest | 0.67.1-r2 |
| wolfi | docker-cli-buildx | 0.32.1-r3 |
| wolfi | docker-compose | 5.1.1-r1 |
| wolfi | guac | 1.1.0-r2 |
| wolfi | kaniko | 1.25.12-r1 |
| wolfi | kubescape | 4.0.5-r0 |
| wolfi | osv-scanner | 2.3.6-r0 |
| wolfi | podman | 6.0.0-r0 |
| wolfi | scorecard | 5.4.0-r15 |
| wolfi | skaffold | 2.18.2-r1 |
| wolfi | trivy | 0.69.3-r6 |
| wolfi | trivy-operator | 0.30.1-r4 |
| wolfi | zot | 2.1.15-r4 |
References
- https://access.redhat.com/security/cve/CVE-2026-33747
- https://github.com/moby/buildkit
- https://github.com/moby/buildkit/releases/tag/v0.28.1
- https://github.com/moby/buildkit/security/advisories/GHSA-4c29-8rgm-jvjj
- https://nvd.nist.gov/vuln/detail/CVE-2026-33747
- https://ubuntu.com/security/notices/USN-8230-1
- https://www.cve.org/CVERecord?id=CVE-2026-33747