How severe is CVE-2026-92123?

CVE-2026-92123 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-92123 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-92123?

CVE-2026-92123 affects Jenkins Script Security. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-92123?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-92123 published?

CVE-2026-92123 was published on 2026-09-16 and last updated on 2026-09-21.

CVE-2026-92123

CVE-2026-92123 is a high-severity vulnerability in Jenkins Script Security with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-693.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-693
Affected product: Jenkins Script Security
Published: 2026-09-16
Last modified: 2026-09-21

Description

Jenkins Script Security Plugin 1415.v9a_f9b_3a_c253d and earlier does not intercept operations performed on a null receiver (method calls, property and attribute accesses, and array accesses), allowing attackers with permission to define and run sandboxed scripts, including Pipelines, to bypass the sandbox protection and execute arbitrary code in the context of the Jenkins controller JVM.

Frequently asked questions

What is CVE-2026-92123?: Jenkins Script Security Plugin 1415.v9a_f9b_3a_c253d and earlier does not intercept operations performed on a null receiver (method calls, property and attribute accesses, and array accesses), allowing attackers with permission to define and run sandboxed scripts, including Pipelines, to bypass the sandbox protection and execute arbitrary code in the context of the Jenkins controller JVM.
How severe is CVE-2026-92123?: CVE-2026-92123 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-92123 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-92123?: CVE-2026-92123 affects Jenkins Script Security. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-92123?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-92123 published?: CVE-2026-92123 was published on 2026-09-16 and last updated on 2026-09-21.

References

https://www.jenkins.io/security/advisory/2026-09-16/#SECURITY-3931

Affected products (1)

cpe:2.3:a:jenkins:script_security:*:*:*:*:*:jenkins:*:*

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