{"id":"CVE-2021-21607","aliases":["BIT-jenkins-2021-21607","GHSA-cxqw-vjcr-gp5g"],"url":"https://o3.security/vulnerability/CVE-2021-21607","summary":"Excessive memory allocation in graph URLs leads to denial of service in Jenkins","details":"Jenkins 2.274 and earlier, LTS 2.263.1 and earlier does not limit sizes provided as query parameters to graph-rendering URLs, allowing attackers to request crafted URLs that use all available memory in Jenkins, potentially leading to out of memory errors.","published":"2021-01-13T16:15:13.740Z","modified":"2026-07-09T00:12:29.972462Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.jenkins-ci.main:jenkins-core","fixedVersion":"2.263.2"},{"ecosystem":"Maven","name":"org.jenkins-ci.main:jenkins-core","fixedVersion":"2.275"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://www.jenkins.io/security/advisory/2021-01-13/#SECURITY-2025"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-09T00:12:29.972462Z"}}