A flaw was found in openstack-mistral. By manipulating the SSH private key filename, the std.ssh action can be used to disclose the presence of arbitrary files within the filesystem of the executor running the action. Since std.ssh privatekeyfilename can take an absolute path, it can be used to assess whether or not a file exists on the executor's filesystem.

A Denial of Service (DoS) condition is possible in OpenStack Mistral in versions up to and including 7.0.3. Submitting a specially crafted workflow definition YAML file containing nested anchors can lead to resource exhaustion culminating in a denial of service.

A vulnerability was discovered that all the data from the TripleO heat stack (user provided and generated passwords, certificates, ssh keys) are available in the mistral logs on the undercloud, in clear text.