CVE-2026-117618VulnerabilityPublished 28 Oct 2026

In Jenkins 2.587 and earlier, LTS 2.580.1 and earlier, the HTTP endpoint for creating the first user account does not

Source GCVE Database

Authoritative record:CVE-2026-117618· High

Not known to be exploited.

Data as of 28 Oct 2026, 19:44 UTC

Severity

High

Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD

Exploitation evidence

Disclosed: evidence found.
CVE published 28 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-vrqw-5jr7-wx5r

What to do

Affected software

Product	Affected	Fixed in
Jenkins ProjectJenkins	Affected–	Fixed in–

Description

Jenkins versions 2.587 and earlier, including LTS 2.580.1 and earlier, contain a vulnerability in the HTTP endpoint used for creating the first user account. This endpoint does not verify whether the setup wizard has been completed, leading to a race condition. An unauthenticated attacker can exploit this flaw to create an administrator account during the initial user account replacement process.

Impact

An unauthenticated attacker can create an administrator account on affected Jenkins instances, potentially gaining full administrative control over the system. This could lead to unauthorized access, configuration changes, and compromise of the Jenkins environment.

Summary

In Jenkins 2.587 and earlier, and LTS 2.580.1 and earlier, the HTTP endpoint responsible for creating the first user account fails to check if the setup wizard has been completed. This results in a race condition vulnerability that allows unauthenticated attackers to create an administrator account while the initial user account is being replaced.

References

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