{"cve":"CVE-2023-38647","nvd":{"published":"2023-07-26T08:15:10.410","modified":"2026-06-17T06:10:52.977","status":"Modified","description":"An attacker can use SnakeYAML to deserialize java.net.URLClassLoader and make it load a JAR from a specified URL, and then deserialize javax.script.ScriptEngineManager to load code using that ClassLoader. This unbounded deserialization can likely lead to remote code execution. The code can be run in Helix REST start and Workflow creation.\n\nAffect all the versions lower and include 1.2.0.\n\nAffected products: helix-core, helix-rest\n\nMitigation: Short term, stop using any YAML based configuration and workflow creation.\n                  Long term, all Helix version bumping up to 1.3.0","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-502"],"references":["https://lists.apache.org/thread/zyqxhv0lc2z9w3tgr8ttrdy2zfh5jvc4","https://lists.apache.org/thread/zyqxhv0lc2z9w3tgr8ttrdy2zfh5jvc4"],"products":["apache:helix"],"source":"nvd","synced_at":"2026-10-19T21:38:35.729974749+00:00"},"epss":{"cve":"CVE-2023-38647","score":0.01953,"percentile":0.8025,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-jhcr-hph9-g7wm","url":"https://osv.dev/vulnerability/GHSA-jhcr-hph9-g7wm","summary":"Deserialization vulnerability in Helix workflow and REST","modified":"2026-09-10T03:49:42.634557893Z","packages":[{"ecosystem":"Maven","name":"org.apache.helix:helix-core","purl":"pkg:maven/org.apache.helix/helix-core","ranges":["<1.3.0"],"fixed":["1.3.0"]},{"ecosystem":"Maven","name":"org.apache.helix:helix-rest","purl":"pkg:maven/org.apache.helix/helix-rest","ranges":["<1.3.0"],"fixed":["1.3.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}