RCE in a widely used Jenkins plugin lets authenticated users run code on the controller JVM, risking CI/CD compromise and credential theft across organizations.
CVE-2026-70431
Jenkins Multijob plugin RCE: authenticated users can execute code on controller.
Is CVE-2026-70431 being exploited?
Not confirmed. CVE-2026-70431 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.37% probability of exploitation in the next 30 days.
How severe is CVE-2026-70431?
CVE-2026-70431 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-70431?
Yes. A fix has been recorded for CVE-2026-70431. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-70431 affect?
CVE-2026-70431 affects Jenkins Multijob Plugin <=669.v9d96a_d9c71b_0, Jenkins controller (master). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-70431?
Restrict Item/Create and Item/Configure, disable or remove Multijob plugin, apply vendor patch when released.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated users with Item/Create or Item/Configure can execute arbitrary code on the Jenkins controller JVM, allowing server compromise, pipeline tampering, and credential theft.
Immediate action required
- affected<= 669.v9d96a_d9c71b_0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.