What’s Vulnerable › Vulnerabilities

CVE-2020-2102

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-01-29 · updated 2026-06-17
• Weakness: CWE-203

Description

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: through 2.204.1; through 2.218

References

• http://www.openwall.com/lists/oss-security/2020/01/29/1
• https://access.redhat.com/errata/RHBA-2020:0402
• https://access.redhat.com/errata/RHBA-2020:0675
• https://access.redhat.com/errata/RHSA-2020:0681
• https://access.redhat.com/errata/RHSA-2020:0683
• https://jenkins.io/security/advisory/2020-01-29/#SECURITY-1660
• http://www.openwall.com/lists/oss-security/2020/01/29/1
• https://access.redhat.com/errata/RHBA-2020:0402
• https://access.redhat.com/errata/RHBA-2020:0675
• https://access.redhat.com/errata/RHSA-2020:0681
• https://access.redhat.com/errata/RHSA-2020:0683
• https://jenkins.io/security/advisory/2020-01-29/#SECURITY-1660

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