{"cve":"CVE-2020-2101","nvd":{"published":"2020-01-29T16:15:12.240","modified":"2026-06-17T03:11:45.503","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","score":5.3},"cwes":["CWE-203"],"references":["http://www.openwall.com/lists/oss-security/2020/01/29/1","https://access.redhat.com/errata/RHBA-2020:0402","https://access.redhat.com/errata/RHBA-2020:0675","https://access.redhat.com/errata/RHSA-2020:0681","https://access.redhat.com/errata/RHSA-2020:0683"],"products":["jenkins:jenkins"],"source":"nvd","synced_at":"2026-10-19T21:01:01.339895972+00:00"},"epss":{"cve":"CVE-2020-2101","score":0.01368,"percentile":0.71872,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-w7jr-wqw6-54xc","url":"https://osv.dev/vulnerability/GHSA-w7jr-wqw6-54xc","summary":"Non-constant time comparison of inbound TCP agent connection secret","modified":"2024-02-16T07:57:46.807710Z","packages":[{"ecosystem":"Maven","name":"org.jenkins-ci.main:jenkins-core","purl":"pkg:maven/org.jenkins-ci.main/jenkins-core","ranges":["<2.204.2"],"fixed":["2.204.2"]},{"ecosystem":"Maven","name":"org.jenkins-ci.main:jenkins-core","purl":"pkg:maven/org.jenkins-ci.main/jenkins-core","ranges":[">=2.205 <2.219"],"fixed":["2.219"]}]}],"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."]}