CVE-2026-121541

Medium

Description

In Docker Buildx versions v0.19.0 through v0.38.0, an untrusted Bake definition that builds multiple targets together may expose files accessible to the Buildx client without the expected fs.read approval. Under certain conditions, filesystem paths from some targets are not verified against the approved entitlements. Users who run untrusted Bake definitions may be affected. The issue is fixed in v0.38.1.

SeverityMedium

CVSS5.6

Exploit probability—

Product

Docker Buildx

PublishedNov 3, 2026

First seenNov 4, 2026

Weakness typeCWE-863Incorrect authorization

How to fix

Update

Docker Docker Buildx0.38.1 or later

Vendor advisories

github.com/docker/buildx/security/advisories/GHSA-xg6v-cv2h-2w5h

Affected products

Product	Affected versions	Fixed in
Docker Docker Buildx	0.19.0 ≤ v < 0.38.1	0.38.1

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