In github.com/distribution/distribution and github.com/distribution/distribution/v3 before 3.1.0, when storage.cache.blobdescriptor is configured with redis and storage.delete.enabled is true, deleting a blob in one repository clears the shared digest descriptor in Redis but leaves stale repository-scoped membership behind. If another repository subsequently requests or stats the same digest, the shared descriptor is repopulated and the deleted blob becomes accessible again in the first repository.