{"cve":"CVE-2021-21639","nvd":{"published":"2021-04-07T14:15:16.890","modified":"2026-06-17T03:35:55.010","status":"Modified","description":"Jenkins 2.286 and earlier, LTS 2.277.1 and earlier does not validate the type of object created after loading the data submitted to the `config.xml` REST API endpoint of a node, allowing attackers with Computer/Configure permission to replace a node with one of a different type.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","score":4.3},"cwes":[],"references":["http://www.openwall.com/lists/oss-security/2021/04/07/2","https://www.jenkins.io/security/advisory/2021-04-07/#SECURITY-1721","http://www.openwall.com/lists/oss-security/2021/04/07/2","https://www.jenkins.io/security/advisory/2021-04-07/#SECURITY-1721"],"products":["jenkins:jenkins"],"source":"nvd","synced_at":"2026-10-19T21:17:01.373894544+00:00"},"epss":{"cve":"CVE-2021-21639","score":0.02725,"percentile":0.8606,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-pvwx-3jx5-24r2","url":"https://osv.dev/vulnerability/GHSA-pvwx-3jx5-24r2","summary":"Lack of type validation in agent related REST API in Jenkins","modified":"2024-02-16T08:06:14.423570Z","packages":[{"ecosystem":"Maven","name":"org.jenkins-ci.main:jenkins-core","purl":"pkg:maven/org.jenkins-ci.main/jenkins-core","ranges":["<2.277.2"],"fixed":["2.277.2"]},{"ecosystem":"Maven","name":"org.jenkins-ci.main:jenkins-core","purl":"pkg:maven/org.jenkins-ci.main/jenkins-core","ranges":[">=2.278 <2.287"],"fixed":["2.287"]}]}],"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."]}