Patch Forecast
Yellow warning
Plan into this sprint.

CVE-2026-117618

Jenkins: race condition

Risk score
56/100
CVSS
8.1 v3.1
Exploit chance (30 days)
0.2%
Published
28 Oct 2026

Open in the live forecast Today's forecast

What to know

What it is
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 replace…
Affected
Jenkins
Fix
Apply the vendor's security update; see the linked advisory.
Exploitation
No known exploitation

Story map

Story map: JenkinsTHE FLAWSTHE FIXCVE-2026-117618Race conditionCVSS 8.1 · EPSS 0%CVE-2026-117616Path traversal can lead toremote code executionCVSS 8.8 · EPSS 0%CVE-2026-117612Unsafe deserialisationCVSS 8.8 · EPSS 0%CVE-2026-117620Jenkins 2.587 and earlier, LTS2.580.1 and earlier allowsattackers with Overall/Read…CVSS 8.8 · EPSS 0%FixApply the vendor's securityupdate; see the linked advisory.Who is exposedJenkinsYELLOW · PLAN IT INJenkinsIn Jenkins 2.587 and earlier,LTS 2.580.1 and earlier, theHTTP endpoint for creating thefirst user account does notcheck whether the setup wizardhas been completed, resulting ina race condition that allows…Where it standsNo known exploitationCONNECTS TOSame weaknessRace condition (CWE-362)102 other warnings in 30 days →Same productEarlier Jenkins warnings9 in the last 90 days →
Story map: the flaws, the fix, how it unfolded and what it connects to. Boxes link to the record or article.

At a glance

Jenkins: Yellow, plan it in. 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 replace…

The flaws

  • CVE-2026-117618: Race condition (CVSS 8.1 · EPSS 0%)
  • CVE-2026-117616: Path traversal can lead to remote code execution (CVSS 8.8 · EPSS 0%)
  • CVE-2026-117612: Unsafe deserialisation (CVSS 8.8 · EPSS 0%)
  • CVE-2026-117620: Jenkins 2.587 and earlier, LTS 2.580.1 and earlier allows attackers with Overall/Read permission to… (CVSS 8.8 · EPSS 0%)

The fix

Fix: Apply the vendor's security update; see the linked advisory.

Who is exposed: Jenkins

Where it stands

  • No known exploitation

Connects to

Why it is Yellow

  • CVSS 8.1 high
  • Remotely exploitable without logging in

References

Original 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.

Last activity 28 Oct 2026. Patch Forecast updates every hour.