What is CVE-2026-92126?

CVE-2026-92126 is a high-severity vulnerability in Jenkins Script Security, classified under Use of Externally-Controlled Input to Select Classes or Code (Unsafe Reflection). CVSS score: 8.5/10. Published 2026-09-16.

How severe is CVE-2026-92126?

High severity. CVSS v3 base score is 8.5 out of 10.

RCE in Jenkins Script Security

CVE-2026-92126

Jenkins Script Security Plugin 1415.v9a_f9b_3a_c253d and earlier does not reject @Builder annotations whose builderStrategy member names an arbitrary class, allowing attackers with permission to define and run sandboxed scripts, including Pipelines, to execute code outside the sandbox if a suitable class is present on the classpath of the component that evaluates the script.

Published 2026-09-16 · last modified 2026-09-27.

CVSS v3 metric

CVSS v3 base score 8.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (49.8th percentile), scored 2026-10-31.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 49.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Weakness classification (CWE)

References

www.jenkins.io/security/advisory/2026-09-16/ (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-92126?: CVE-2026-92126 is a high-severity vulnerability in Jenkins Script Security, classified under Use of Externally-Controlled Input to Select Classes or Code (Unsafe Reflection). CVSS score: 8.5/10. Published 2026-09-16.
How severe is CVE-2026-92126?: High severity. CVSS v3 base score is 8.5 out of 10.