{"id":"CVE-2018-16848","aliases":["GHSA-443j-6p7g-6v4w","PYSEC-2020-240"],"url":"https://o3.security/vulnerability/CVE-2018-16848","summary":"OpenStack Mistral DoS","details":"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.","published":"2020-06-15T15:15:09.427Z","modified":"2026-08-07T14:58:36.367498Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"mistral","fixedVersion":"10.0.0"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://bugs.launchpad.net/mistral/+bug/1785657"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1645332"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T14:58:36.367498Z"}}