Low [CVE-2026-121542] In Docker Buildx versions v0.19.0 through v0.38.0, an untrusted Bake definition may expose files accessible to the Buildx client without the expected fs.read approval
This low-severity Docker advisory covers CVE-2026-121542 affecting Docker Buildx.
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Summary
In Docker Buildx versions v0.19.0 through v0.38.0, an untrusted Bake definition may expose files accessible to the Buildx client without the expected fs.read approval.
Under certain conditions, paths under the same parent directory as the current working directory whose names use the working directory's basename as a prefix can skip the filesystem entitlement check. Exploitation requires specific matching filenames next to the current project directory.
Users who run untrusted Bake definitions may be affected. The issue is fixed in v0.38.1.
- through 0.38.0
NVD record · high-confidence parse· fetched 1 day ago·verify at source
Mitigation
Upgrade to a fixed release: 0.38.1. That is the remediation for this advisory.
The vendor advisory may list interim mitigations or workarounds not captured here. Review it before change work.
NVD record · high-confidence parse· fetched 1 day ago·verify at source
More Docker advisories
- CVE-2026-121541Nov 3, 2026In Docker Buildx versions v0.19.0 through v0.38.0, an untrusted Bake definition
- CVE-2026-93325Nov 3, 2026Docker: Buildx bake requires the user to grant entitlements with --allow or an interactive
- CVE-2026-103433Oct 5, 2026Docker Buildx Bake does not request the expected fs.read approval for certain filesystem
- CVE-2026-121520Nov 3, 2026In BuildKit versions prior to v0.34.1, a malicious client with access to the BuildKit
- CVE-2026-121522Nov 3, 2026In BuildKit versions v0.26.0 through v0.34.1, a specific build definition that resolves
- CVE-2026-121614Nov 3, 2026Docker Sandboxes versions 0.31.0 before 0.50.0 do not neutralize repository-controlled Git
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