Path Traversal in Moby Buildkit
CVE-2026-33747
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…
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.005 (39.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Moby Buildkit — versions < 0.28.1
- Mobyproject Buildkit
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Mitigation, Vendor Advisory)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-33747?
- CVE-2026-33747 is a high-severity vulnerability in Moby Buildkit, classified under Path Traversal. CVSS score: 8.4/10. Published 2026-03-27.
- How severe is CVE-2026-33747?
- High severity. CVSS v3 base score is 8.4 out of 10.