CVE-2020-2102: Jenkins

Medium severity, CVSS 5.3. EPSS: 1.4% chance of exploitation in the next 30 days.

Jenkins 2.218 and earlier, LTS 2.204.1 and earlier used a non-constant time comparison function when validating an HMAC.

Affected products

• Jenkins Jenkins: up to and including 2.204.1; up to and including 2.218

Published 2020-01-29. Last modified 2026-06-17.