CVE-2026-103433 Bake filesystem entitlement consent is skipped for certain secret and oci-layout definitions
Attackers can read local files or access OCI layouts by bypassing filesystem entitlement checks in Docker Buildx Bake definitions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-103433?
CVE-2026-103433 is a medium-severity missing authorization vulnerability in Docker Buildx, published on 5 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Docker Buildx Bake does not request the expected fs.read approval for certain filesystem inputs. An untrusted Bake definition can expose a readable file through a pathless secret whose ID is interpreted as a client-side pathname, or consume a local OCI image layout outside the project after entitlement validation checks a different path representation. Users who run untrusted Bake definitions are affected.
Weakness: CWE-862
Which versions are affected by CVE-2026-103433?
How do I fix CVE-2026-103433?
Apply the vendor's patch.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-103433 being exploited?
There is no known exploitation of CVE-2026-103433 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-103433, DEBIAN-CVE-2026-103433, ECHO-649c-d979-2cbe, GHSA-p54p-jq4x-rc28, UBUNTU-CVE-2026-103433.