{"id":"CVE-2023-47163","aliases":["GHSA-gw7g-qr8w-3448","PYSEC-2023-236"],"url":"https://o3.security/vulnerability/CVE-2023-47163","summary":"Remarshal expands YAML alias nodes unlimitedly, hence Remarshal is vulnerable to Billion Laughs Attack","details":"Remarshal prior to v0.17.1 expands YAML alias nodes unlimitedly, hence Remarshal is vulnerable to Billion Laughs Attack. Processing untrusted YAML files may cause a denial-of-service (DoS) condition.","published":"2023-11-13T02:26:42.658Z","modified":"2026-07-15T01:49:17.930647388Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"remarshal","fixedVersion":"0.17.1"}],"fix":{"url":"https://github.com/remarshal-project/remarshal/commit/fd6ac799a02f533c3fc243b49cdd6d21aa7ee494","label":"remarshal-project/remarshal@fd6ac79"},"references":[{"type":"WEB","url":"https://github.com/remarshal-project/remarshal/releases/tag/v0.17.1"},{"type":"WEB","url":"https://jvn.jp/en/jp/JVN86156389/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/47xxx/CVE-2023-47163.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-47163"},{"type":"FIX","url":"https://github.com/remarshal-project/remarshal/commit/fd6ac799a02f533c3fc243b49cdd6d21aa7ee494"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:49:17.930647388Z"}}