How severe is CVE-2026-84659?

CVE-2026-84659 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-84659 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-84659?

CVE-2026-84659 affects Jenkins Script Security. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-84659?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2026-84659 published?

CVE-2026-84659 was published on 2026-09-02 and last updated on 2026-09-22.

CVE-2026-84659

CVE-2026-84659 is a medium-severity vulnerability in Jenkins Script Security with a CVSS 3.x base score of 4.3. 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-862.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-862
Affected product: Jenkins Script Security
Published: 2026-09-02
Last modified: 2026-09-22

Description

Jenkins Script Security Plugin 1412.v7737b_3405f86 and earlier does not enforce a permission check in the method that controls the "Force the use of the sandbox globally in the system" setting, allowing attackers to disable it through Stapler data binding.

Frequently asked questions

What is CVE-2026-84659?: Jenkins Script Security Plugin 1412.v7737b_3405f86 and earlier does not enforce a permission check in the method that controls the "Force the use of the sandbox globally in the system" setting, allowing attackers to disable it through Stapler data binding.
How severe is CVE-2026-84659?: CVE-2026-84659 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-84659 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-84659?: CVE-2026-84659 affects Jenkins Script Security. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-84659?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-84659 published?: CVE-2026-84659 was published on 2026-09-02 and last updated on 2026-09-22.

References

https://www.jenkins.io/security/advisory/2026-09-02/#SECURITY-3986

Affected products (1)

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

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