{"id":"CVE-2023-47163","aliases":["EUVD-2023-0225","GHSA-gw7g-qr8w-3448","PYSEC-2023-236"],"status":"published","title":"Remarshal expands YAML alias nodes unlimitedly, hence Remarshal is vulnerable to Billion Laughs Attack","description":"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.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.01186,"percentile":0.68241,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-400","CWE-674"],"published":"2023-11-13T02:26:42Z","modified":"2026-10-28T02:30:24Z","fixes":[{"ecosystem":"PyPI","package":"remarshal","fixed_in":["0.17.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"remarshal","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.17.1"}]}]},{"source":"osv","ecosystem":"PyPI","package":"remarshal","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.17.1"}]}],"versions":["0.10.0","0.11.0","0.11.1","0.11.2","0.12.0","0.14.0","0.15.0","0.15.1","0.16.0","0.16.1","0.17.0","0.8.0","0.9.0","0.9.1","0.9.2"]},{"source":"osv","ecosystem":"PyPI","package":"remarshal","ranges":[{"type":"GIT","events":[{"introduced":"0"},{"fixed":"fd6ac799a02f533c3fc243b49cdd6d21aa7ee494"}]},{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.17.1"}]}],"versions":["0.10.0","0.11.0","0.11.1","0.11.2","0.12.0","0.14.0","0.15.0","0.15.1","0.16.0","0.16.1","0.17.0","0.8.0","0.9.0","0.9.1","0.9.2","v0.17.0","v0.16.1","v0.16.0","v0.15.1","v0.15.0","v0.14.0","v0.13.0","v0.12.0","v0.11.2","v0.11.1","v0.11.0","v0.10.0","v0.9.2","v0.9.1","v0.9.0","v0.8.0","v0.7.0","v0.6.0","v0.5.1","v0.5.0","v0.4.0","v0.3.0","v0.2.1"]}],"products":[{"vendor":"remarshal-project","product":"remarshal"},{"vendor":"remarshal_project","product":"remarshal"}],"references":[{"url":"https://github.com/remarshal-project/remarshal/releases/tag/v0.17.1","tags":["x_transferred","Release Notes","web"]},{"url":"https://github.com/remarshal-project/remarshal/commit/fd6ac799a02f533c3fc243b49cdd6d21aa7ee494","tags":["x_transferred","Patch","fix","web"]},{"url":"https://jvn.jp/en/jp/JVN86156389/","tags":["x_transferred","Third Party Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-47163","tags":["advisory"]},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/remarshal/PYSEC-2023-236.yaml","tags":["web"]},{"url":"https://jvn.jp/en/jp/JVN86156389","tags":["web"]},{"url":"https://github.com/advisories/GHSA-gw7g-qr8w-3448","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/47xxx/CVE-2023-47163.json","tags":["advisory"]},{"url":"https://github.com/remarshal-project/remarshal","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2023-47163","description":"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.","status":"published","published":"2023-11-13T02:26:42.658Z","modified":"2025-01-08T21:35:11.153Z","updated_at":"2026-11-02T14:35:14.298866Z"}],"euvd":[{"id":"EUVD-2023-0225","description":"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.","status":"published","published":"2023-11-13T02:26:42Z","modified":"2025-01-08T21:35:11Z","cvss":[{"version":"","score":0,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"none"}],"updated_at":"2026-11-03T00:04:23.094473Z"}],"ghsa":[{"id":"GHSA-gw7g-qr8w-3448","title":"Remarshal expands YAML alias nodes unlimitedly, hence Remarshal is vulnerable to Billion Laughs Attack","description":"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.","status":"published","published":"2023-11-13T03:30:37Z","modified":"2024-10-26T18:35:38Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400","CWE-674"],"updated_at":"2026-11-02T14:38:13.90937Z"}],"nvd":[{"id":"CVE-2023-47163","description":"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.","status":"published","published":"2023-11-13T03:15:09.743Z","modified":"2026-06-17T06:32:15.88Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-674"],"updated_at":"2026-11-02T14:08:46.647045Z"}],"osv":[{"id":"GHSA-gw7g-qr8w-3448","title":"Remarshal expands YAML alias nodes unlimitedly, hence Remarshal is vulnerable to Billion Laughs Attack","description":"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.","status":"published","published":"2023-11-13T03:30:37Z","modified":"2024-10-26T18:50:36.268136Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"},{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-400","CWE-674"],"updated_at":"2026-11-02T15:46:48.191583Z"},{"id":"PYSEC-2023-236","description":"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.","status":"published","published":"2023-11-13T03:15:00Z","modified":"2026-06-10T17:02:36.562197631Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:53.837392Z"},{"id":"CVE-2023-47163","description":"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.","status":"published","published":"2023-11-13T02:26:42.658Z","modified":"2026-10-28T02:30:24.127600034Z","updated_at":"2026-11-02T15:44:34.287121Z"}]}}