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 …

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No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

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.

Source published

28 Oct 2026 16:48:32 UTC

Source modified

28 Oct 2026 16:48:32 UTC

Observed here

28 Oct 2026 17:46:48 UTC

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