CVE-2026-33747
CVE-2026-33747 · BuildKit vulnerable to malicious frontend causing file escape outside of storage root
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 8.4 · High · EPSS 0.6% · Fix available
- Published
- Updated
Stack: system
Affected products and versions
buildkit
- Versions
- < 0.28.1: Affected
No fix published
docker.io Debian:12
- Versions
- 20.10.24+dfsg1-1
- 20.10.24+dfsg1-1+deb12u1
- 20.10.25+dfsg1-1
- 20.10.25+dfsg1-2
- 20.10.25+dfsg1-3
- 20.10.25+dfsg1-4
- 26.1.4+dfsg1-1
- 26.1.4+dfsg1-2
- 26.1.4+dfsg1-3
- 26.1.4+dfsg1-4
- 26.1.4+dfsg1-5
- 26.1.4+dfsg1-6
- 26.1.4+dfsg1-7
- 26.1.4+dfsg1-8
- 26.1.4+dfsg1-9
- 26.1.4+dfsg2-1
- 26.1.4+dfsg3-1
- 26.1.5+dfsg1-1
- 26.1.5+dfsg1-10
- 26.1.5+dfsg1-2
- 26.1.5+dfsg1-3
- 26.1.5+dfsg1-4
- 26.1.5+dfsg1-5
- 26.1.5+dfsg1-6
- 26.1.5+dfsg1-7
- 26.1.5+dfsg1-8
- 26.1.5+dfsg1-9
- 27.5.1+dfsg1-1
- 27.5.1+dfsg1-2
- 27.5.1+dfsg2-1
- 27.5.1+dfsg3-1
- 27.5.1+dfsg3-2
- 27.5.1+dfsg3-3
- 27.5.1+dfsg3-4
- 27.5.1+dfsg3-5
- 27.5.1+dfsg3-6
- 27.5.1+dfsg4-1
- 27.5.1+dfsg4-2
- 28.5.2+dfsg1-1
- 28.5.2+dfsg2-1
- 28.5.2+dfsg3-1
- 28.5.2+dfsg3-2
- 28.5.2+dfsg4-1
- 28.5.2+dfsg4-2
- 28.5.2+dfsg4-3
- 28.5.2+dfsg4-4
- 28.5.2+dfsg4-5
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
docker.io Debian:13
- Versions
- 26.1.5+dfsg1-9
- Affected ranges
- ECOSYSTEM: < 26.1.5+dfsg1-9+deb13u1
Update to 26.1.5+dfsg1-9+deb13u1
docker.io Debian:14
- Versions
- 26.1.5+dfsg1-10
- 26.1.5+dfsg1-9
- 27.5.1+dfsg1-1
- 27.5.1+dfsg1-2
- 27.5.1+dfsg2-1
- 27.5.1+dfsg3-1
- 27.5.1+dfsg3-2
- 27.5.1+dfsg3-3
- 27.5.1+dfsg3-4
- 27.5.1+dfsg3-5
- 27.5.1+dfsg3-6
- 27.5.1+dfsg4-1
- 27.5.1+dfsg4-2
- 28.5.2+dfsg1-1
- 28.5.2+dfsg2-1
- 28.5.2+dfsg3-1
- 28.5.2+dfsg3-2
- 28.5.2+dfsg4-1
- 28.5.2+dfsg4-2
- Affected ranges
- ECOSYSTEM: < 28.5.2+dfsg4-3
Update to 28.5.2+dfsg4-3
docker.io Ubuntu:Pro:16.04:LTS
- Versions
- 1.6.2~dfsg1-1ubuntu4
- 1.10.2-0ubuntu3
- 1.10.2-0ubuntu4
- 1.10.3-0ubuntu1
- 1.10.3-0ubuntu4
- 1.10.3-0ubuntu5
- 1.10.3-0ubuntu6
- 1.11.2-0ubuntu5~16.04
- 1.12.1-0ubuntu13~16.04.1
- 1.12.3-0ubuntu4~16.04.2
- 1.12.6-0ubuntu1~16.04.1
- 1.13.1-0ubuntu1~16.04.2
- 17.03.2-0ubuntu2~16.04.1
- 18.06.1-0ubuntu1~16.04.2
- 18.06.1-0ubuntu1.2~16.04.1
- 18.09.2-0ubuntu1~16.04.1
- 18.09.5-0ubuntu1~16.04.2
- 18.09.7-0ubuntu1~16.04.1
- 18.09.7-0ubuntu1~16.04.4
- 18.09.7-0ubuntu1~16.04.5
- 18.09.7-0ubuntu1~16.04.6
- 18.09.7-0ubuntu1~16.04.7
- 18.09.7-0ubuntu1~16.04.9+esm1
- 18.09.7-0ubuntu1~16.04.9+esm2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
docker.io Ubuntu:Pro:18.04:LTS
- Versions
- 1.13.1-0ubuntu6
- 17.03.2-0ubuntu1
- 17.03.2-0ubuntu3
- 17.03.2-0ubuntu5
- 17.12.1-0ubuntu1
- 18.06.1-0ubuntu1~18.04.1
- 18.06.1-0ubuntu1.2~18.04.1
- 18.09.2-0ubuntu1~18.04.1
- 18.09.5-0ubuntu1~18.04.2
- 18.09.7-0ubuntu1~18.04.1
- 18.09.7-0ubuntu1~18.04.3
- 18.09.7-0ubuntu1~18.04.4
- 19.03.6-0ubuntu1~18.04.1
- 19.03.6-0ubuntu1~18.04.2
- 19.03.6-0ubuntu1~18.04.3
- 20.10.2-0ubuntu1~18.04.2
- 20.10.2-0ubuntu1~18.04.3
- 20.10.7-0ubuntu1~18.04.1
- 20.10.7-0ubuntu1~18.04.2
- 20.10.7-0ubuntu5~18.04.2
- 20.10.7-0ubuntu5~18.04.3
- 20.10.12-0ubuntu2~18.04.1
- 20.10.21-0ubuntu1~18.04.2
- 20.10.21-0ubuntu1~18.04.3
- 20.10.21-0ubuntu1~18.04.3+esm1
- 20.10.21-0ubuntu1~18.04.3+esm2
- 20.10.21-0ubuntu1~18.04.3+esm3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
docker.io Ubuntu:Pro:20.04:LTS
- Versions
- 19.03.2-0ubuntu1
- 19.03.6-0ubuntu1
- 19.03.8-0ubuntu1
- 19.03.8-0ubuntu1.20.04
- 19.03.8-0ubuntu1.20.04.1
- 19.03.8-0ubuntu1.20.04.2
- 20.10.2-0ubuntu1~20.04.2
- 20.10.2-0ubuntu1~20.04.3
- 20.10.7-0ubuntu1~20.04.1
- 20.10.7-0ubuntu1~20.04.2
- 20.10.7-0ubuntu5~20.04.1
- 20.10.7-0ubuntu5~20.04.2
- 20.10.12-0ubuntu2~20.04.1
- 20.10.21-0ubuntu1~20.04.1
- 20.10.21-0ubuntu1~20.04.2
- 20.10.21-0ubuntu1~20.04.4
- 20.10.21-0ubuntu1~20.04.5
- 20.10.21-0ubuntu1~20.04.6
- 20.10.21-0ubuntu1~20.04.6+esm1
- 20.10.21-0ubuntu1~20.04.6+esm2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
docker.io-app Ubuntu:Pro:20.04:LTS
- Versions
- 20.10.25-0ubuntu1~20.04.1
- 20.10.25-0ubuntu1~20.04.2
- 24.0.5-0ubuntu1~20.04.1
- 24.0.7-0ubuntu2~20.04.1
- 26.1.3-0ubuntu1~20.04.1
- 26.1.3-0ubuntu1~20.04.1+esm1
- Affected ranges
- ECOSYSTEM: < 26.1.3-0ubuntu1~20.04.1+esm2
Update to 26.1.3-0ubuntu1~20.04.1+esm2
docker.io-app Ubuntu:22.04:LTS
- Versions
- 20.10.25-0ubuntu1~22.04.1
- 20.10.25-0ubuntu1~22.04.2
- 24.0.5-0ubuntu1~22.04.1
- 24.0.7-0ubuntu2~22.04.1
- 26.1.3-0ubuntu1~22.04.1
- 27.5.1-0ubuntu3~22.04.1
- 27.5.1-0ubuntu3~22.04.2
- 28.2.2-0ubuntu1~22.04.1
- 29.1.3-0ubuntu3~22.04.1
- Affected ranges
- ECOSYSTEM: < 29.1.3-0ubuntu3~22.04.2
Update to 29.1.3-0ubuntu3~22.04.2
docker.io Ubuntu:Pro:22.04:LTS
- Versions
- 20.10.7-0ubuntu5
- 20.10.7-0ubuntu7
- 20.10.12-0ubuntu1
- 20.10.12-0ubuntu2
- 20.10.12-0ubuntu3
- 20.10.12-0ubuntu3+gke1.24.1
- 20.10.12-0ubuntu4
- 20.10.21-0ubuntu1~22.04.2
- 20.10.21-0ubuntu1~22.04.3
- 20.10.21-0ubuntu1~22.04.5
- 20.10.21-0ubuntu1~22.04.6
- 20.10.21-0ubuntu1~22.04.7
- 20.10.21-0ubuntu1~22.04.7+esm1
- 20.10.21-0ubuntu1~22.04.7+esm2
- 20.10.21-0ubuntu1~22.04.8
- 20.10.21-0ubuntu1~22.04.8+esm1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
docker.io-app Ubuntu:24.04:LTS
- Versions
- 24.0.5-0ubuntu1
- 24.0.7-0ubuntu1
- 24.0.7-0ubuntu2
- 24.0.7-0ubuntu3
- 24.0.7-0ubuntu4
- 24.0.7-0ubuntu4.1
- 26.1.3-0ubuntu1~24.04.1
- 27.5.1-0ubuntu3~24.04.1
- 27.5.1-0ubuntu3~24.04.2
- 28.2.2-0ubuntu1~24.04.1
- 29.1.3-0ubuntu3~24.04.1
- Affected ranges
- ECOSYSTEM: < 29.1.3-0ubuntu3~24.04.2
Update to 29.1.3-0ubuntu3~24.04.2
docker.io Ubuntu:Pro:24.04:LTS
- Versions
- 20.10.24+dfsg1-1ubuntu2
- 20.10.25+dfsg1-2ubuntu1
- 20.10.25+dfsg1-2ubuntu1+esm1
- 20.10.25+dfsg1-2ubuntu1+esm2
- 20.10.25+dfsg1-2ubuntu1.24.04.1
- 20.10.25+dfsg1-2ubuntu1.24.04.1+esm1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
docker.io Ubuntu:25.10
- Versions
- 26.1.5+dfsg1-9ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
docker.io-app Ubuntu:25.10
- Versions
- 27.5.1-0ubuntu3
- 27.5.1-0ubuntu4
- 28.2.2-0ubuntu1
- 29.1.3-0ubuntu3~25.10.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
docker.io Ubuntu:26.10
- Versions
- 27.5.1+dfsg4-2ubuntu1
- 28.5.2+dfsg4-5ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
docker.io-app Ubuntu:26.10
- Versions
- 29.1.3-0ubuntu4
- Affected ranges
- ECOSYSTEM: < 29.1.3-0ubuntu5
Update to 29.1.3-0ubuntu5
docker.io Ubuntu:26.04:LTS
- Versions
- 26.1.5+dfsg1-9ubuntu1
- 27.5.1+dfsg4-1ubuntu1
- 27.5.1+dfsg4-2ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
docker.io-app Ubuntu:26.04:LTS
- Versions
- 28.2.2-0ubuntu1
- 29.1.2-0ubuntu1
- 29.1.3-0ubuntu1
- 29.1.3-0ubuntu2
- 29.1.3-0ubuntu3
- 29.1.3-0ubuntu4
- Affected ranges
- ECOSYSTEM: < 29.1.3-0ubuntu4.1
Update to 29.1.3-0ubuntu4.1