CVE-2021-21690: Jenkins

Critical severity, CVSS 9.8. EPSS: 2.5% chance of exploitation in the next 30 days.

Agent processes are able to completely bypass file path filtering by wrapping the file operation in an agent file path in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier.

Affected products

• Jenkins Jenkins: before 2.303.3 (fixed in 2.303.3); before 2.319 (fixed in 2.319)

Published 2021-11-04. Last modified 2026-06-17.