Unscored severity · published Oct 28, 2026
CVE-2026-117618
In Jenkins 2.587 and earlier, LTS 2.580.1 and earlier, the HTTP endpoint for creating the first user account does not check whether the setup wizard has been completed, resulting…
New
–
CVSS
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EPSS
No
On KEV
Description
In Jenkins 2.587 and earlier, LTS 2.580.1 and earlier, the HTTP endpoint for creating the first user account does not check whether the setup wizard has been completed, resulting in a race condition that allows unauthenticated attackers to create an administrator account while the initial user account is being replaced.
Exploitation
Is it being used?
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
JE
Jenkins · Jenkins
All versions, or not specified · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-117618
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-117618
www.jenkins.io
https://www.jenkins.io/security/advisory/2026-10-28/#SECURITY-4122
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