How severe is CVE-2026-48921?

CVE-2026-48921 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-48921 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-48921?

CVE-2026-48921 affects Jenkins Pipeline. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-48921?

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.

Does CVE-2026-48921 have an EU (EUVD) identifier?

Yes. CVE-2026-48921 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32512.

When was CVE-2026-48921 published?

CVE-2026-48921 was published on 2026-05-27 and last updated on 2026-06-17.

CVE-2026-48921

CVE-2026-48921 is a high-severity vulnerability in Jenkins Pipeline with a CVSS 3.x base score of 7.5. 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-59.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-32512
Weakness: CWE-59
Affected product: Jenkins Pipeline
Published: 2026-05-27
Last modified: 2026-06-17

Description

Jenkins Pipeline: Groovy Libraries Plugin 797.v90ea_a_9b_e45a_0 and earlier does not prohibit symbolic links in shared libraries, allowing attackers able to control the content of a library used by a Pipeline job to read arbitrary files on the Jenkins controller filesystem.

Frequently asked questions

What is CVE-2026-48921?: Jenkins Pipeline: Groovy Libraries Plugin 797.v90ea_a_9b_e45a_0 and earlier does not prohibit symbolic links in shared libraries, allowing attackers able to control the content of a library used by a Pipeline job to read arbitrary files on the Jenkins controller filesystem.
How severe is CVE-2026-48921?: CVE-2026-48921 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-48921 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-48921?: CVE-2026-48921 affects Jenkins Pipeline. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-48921?: 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.
Does CVE-2026-48921 have an EU (EUVD) identifier?: Yes. CVE-2026-48921 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32512.
When was CVE-2026-48921 published?: CVE-2026-48921 was published on 2026-05-27 and last updated on 2026-06-17.

References

https://www.jenkins.io/security/advisory/2026-05-27/#SECURITY-3727

Affected products (1)

cpe:2.3:a:jenkins:pipeline\:_groovy_libraries:*:*:*:*:*:*:*:*

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