Bug 2546173 (CVE-2026-103433)

Summary: CVE-2026-103433 github.com/docker/buildx: Docker Buildx: Information disclosure via untrusted Bake definition
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: amctagga, aoconnor, bniver, flucifre, gmeno, groman, mbenjamin, mhackett, sostapov, vereddy
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Docker Buildx. This vulnerability allows an attacker to cause information disclosure by convincing a user to run an untrusted Bake build definition. Due to missing filesystem read authorization checks, an untrusted build configuration can access client-side files or container images outside the intended project directory without user permission.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-10-05 22:01:56 UTC 
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.