Bug 2546011 (CVE-2026-93317)

Summary: CVE-2026-93317 github.com/moby/buildkit: BuildKit: Build integrity compromise via unvalidated blob digest caching
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: doconnor
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in BuildKit. An unauthenticated remote attacker controlling a container registry or Open Container Initiative (OCI) blob source can provide data that does not match its claimed cryptographic digest. Because BuildKit caches the resulting snapshot under the claimed digest, subsequent container builds may reuse the manipulated content, compromising build integrity.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-10-05 17:52:41 UTC
An unauthenticated attacker controlling a registry or OCI-layout blob source could provide blob contents that did not match the claimed digest. The resulting snapshot could be cached under that digest and reused by a later victim build, compromising build-input integrity.