How severe is CVE-2026-57300?

CVE-2026-57300 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 low, integrity none, and availability none.

Is CVE-2026-57300 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-57300?

CVE-2026-57300 affects Jenkins Mcp Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-57300?

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

Does CVE-2026-57300 have an EU (EUVD) identifier?

Yes. CVE-2026-57300 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38781.

When was CVE-2026-57300 published?

CVE-2026-57300 was published on 2026-06-24 and last updated on 2026-06-26.

CVE-2026-57300

CVE-2026-57300 is a medium-severity vulnerability in Jenkins Mcp Server 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% (7th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-38781
Weakness: CWE-862
Affected product: Jenkins Mcp Server
Published: 2026-06-24
Last modified: 2026-06-26

Description

A missing permission check in Jenkins MCP Server Plugin 0.177.v629fdb_2557fe and earlier allows attackers with Item/Read permission to read the Pipeline replay scripts of jobs they can access.

Frequently asked questions

What is CVE-2026-57300?: A missing permission check in Jenkins MCP Server Plugin 0.177.v629fdb_2557fe and earlier allows attackers with Item/Read permission to read the Pipeline replay scripts of jobs they can access.
How severe is CVE-2026-57300?: CVE-2026-57300 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 low, integrity none, and availability none.
Is CVE-2026-57300 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-57300?: CVE-2026-57300 affects Jenkins Mcp Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-57300?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-57300 have an EU (EUVD) identifier?: Yes. CVE-2026-57300 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38781.
When was CVE-2026-57300 published?: CVE-2026-57300 was published on 2026-06-24 and last updated on 2026-06-26.

References

https://www.jenkins.io/security/advisory/2026-06-24/#SECURITY-3759

Affected products (1)

cpe:2.3:a:jenkins:mcp_server:*:*:*:*:*:jenkins:*:*

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