{"id":"CVE-2020-2101","aliases":["BIT-jenkins-2020-2101","GHSA-w7jr-wqw6-54xc"],"url":"https://o3.security/vulnerability/CVE-2020-2101","summary":"Non-constant time comparison of inbound TCP agent connection secret","details":"Jenkins 2.218 and earlier, LTS 2.204.1 and earlier did not use a constant-time comparison function for validating connection secrets, which could potentially allow an attacker to use a timing attack to obtain this secret.","published":"2020-01-29T16:15:12.240Z","modified":"2026-07-08T16:27:41.185437Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.jenkins-ci.main:jenkins-core","fixedVersion":"2.204.2"},{"ecosystem":"Maven","name":"org.jenkins-ci.main:jenkins-core","fixedVersion":"2.219"}],"fix":null,"references":[{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2020/01/29/1"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHBA-2020:0402"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHBA-2020:0675"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2020:0681"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2020:0683"},{"type":"ADVISORY","url":"https://jenkins.io/security/advisory/2020-01-29/#SECURITY-1659"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T16:27:41.185437Z"}}