{"cve":"CVE-2017-20189","nvd":{"published":"2024-01-22T06:15:07.563","modified":"2026-06-17T01:15:22.077","status":"Modified","description":"In Clojure before 1.9.0, classes can be used to construct a serialized object that executes arbitrary code upon deserialization. This is relevant if a server deserializes untrusted objects.","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://clojure.atlassian.net/browse/CLJ-2204","https://github.com/clojure/clojure/commit/271674c9b484d798484d134a5ac40a6df15d3ac3","https://github.com/frohoff/ysoserial/pull/68/files","https://hackmd.io/%40fe1w0/HyefvRQKp","https://security.snyk.io/vuln/SNYK-JAVA-ORGCLOJURE-5740378"],"products":["clojure:clojure"],"source":"nvd","synced_at":"2026-10-19T21:44:57.175229480+00:00"},"epss":{"cve":"CVE-2017-20189","score":0.01332,"percentile":0.71101,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-jgxc-8mwq-9xqw","url":"https://osv.dev/vulnerability/GHSA-jgxc-8mwq-9xqw","summary":"Clojure classes can be used to craft a serialized object that runs arbitrary code on deserialization","modified":"2025-11-04T01:00:11.651137Z","packages":[{"ecosystem":"Maven","name":"org.clojure:clojure","purl":"pkg:maven/org.clojure/clojure","ranges":["<1.9.0"],"fixed":["1.9.0"]}]}],"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."]}