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.

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: 0.001 (19.8th 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

Weakness classification (CWE)

CWE-22 — Path Traversal

References

https://github.com/moby/buildkit/security/advisories/GHSA-4c29-8rgm-jvjj (x_refsource_CONFIRM)
https://github.com/moby/buildkit/releases/tag/v0.28.1 (x_refsource_MISC)

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.