CVE-2026-33747CRITICAL 9.8EPSS p38.7%
CVE-2026-33747CVE-2026-33747
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.
Scoring
| CVSS 3.1 | 9.8 (CRITICAL) |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 0.50% probability of exploitation · percentile 38.7% · 2026-06-19T12:03:05Z |
| Published | 2026-03-27 |
| Last modified | 2026-04-01 |
Underlying weaknesses· 1
References
1
| Type | Target | Confidence | Tier |
|---|---|---|---|
| Weakness | Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')cwe-22 | 0% | live |
Related by meaning· 6
Nearest entities by semantic similarity across the cs-graph corpus.