UpHeron
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Servers and applications

CVE-2021-21639

Jenkins 2.286 and earlier, LTS 2.277.1 and earlier does not validate the type of object created after loading the data submitted to the `config.xml` REST API endpoint of a node, allowing attackers with Computer/Configure permission to replace a node with one of a different type.

Severity
Medium 4.3
Published
7 Apr 2021
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
JenkinsServers and applications · cpe:a:jenkins:jenkins
  • Every version up to 2.277.1
  • Every version up to 2.286

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-21639
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-21639