CVE-2020-2102

5.3 mediumEPSS 1.4%

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

Severity

5.3 medium

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS: 1.4% chance of exploitation in the next 30 days; higher than 72% of CVEs (scores of 2026-10-31)
CWE: CWE-203
Published: 2020-01-29
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Advisory	Ecosystem	Package	Affected	Fixed in
GHSA-fj6f-6933-839j	Maven	org.jenkins-ci.main:jenkins-core	<2.204.2	2.204.2
GHSA-fj6f-6933-839j	Maven	org.jenkins-ci.main:jenkins-core	>=2.205 <2.219	2.219