{"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":{"score":0.01185,"percentile":0.66255,"asOf":"2026-09-16"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"mistral","fixedVersion":"10.0.0"}],"fix":{"url":"https://github.com/openstack/mistral/commit/eac23d9e774f658f9d4743c99aa2743eb104c3f9","label":"openstack/mistral@eac23d9"},"references":[{"type":"ADVISORY","url":"https://bugs.launchpad.net/mistral/+bug/1785657"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1645332"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2018-16848"},{"type":"WEB","url":"https://github.com/openstack/mistral/commit/eac23d9e774f658f9d4743c99aa2743eb104c3f9"},{"type":"PACKAGE","url":"https://github.com/openstack/mistral"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/mistral/PYSEC-2020-240.yaml"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T14:58:36.367498Z"}}