CVE-2021-21607: Jenkins

Medium severity, CVSS 6.5. EPSS: 1.5% chance of exploitation in the next 30 days.

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.

Affected products

• Jenkins Jenkins: up to and including 2.263.1; up to and including 2.274

Published 2021-01-13. Last modified 2026-06-17.