{"id":"CVE-2026-8120","state":"PUBLISHED","title":"Open5GS NSSF nnssf-handler.c denial of service","description":"A flaw has been found in Open5GS up to 2.7.7. The affected element is the function nssf_nnrf_nsselection_handle_get_from_amf_or_vnssf of the file /src/nssf/nnssf-handler.c of the component NSSF. Executing a manipulation can lead to denial of service. The attack can be executed remotely. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.","publishedAt":"2026-05-08T00:15:09.713Z","updatedAt":"2026-05-08T20:19:08.468Z","severity":{"score":5.3,"label":"Medium","version":"4.0","vector":"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","source":"VulDB"},"assigner":"VulDB","products":["n/a Open5GS"],"affected":[{"vendor":"n/a","product":"Open5GS","versions":[{"version":"2.7.0","status":"affected"},{"version":"2.7.1","status":"affected"},{"version":"2.7.2","status":"affected"},{"version":"2.7.3","status":"affected"},{"version":"2.7.4","status":"affected"},{"version":"2.7.5","status":"affected"},{"version":"2.7.6","status":"affected"},{"version":"2.7.7","status":"affected"}],"cpes":["cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:*"],"modules":["NSSF"]}],"references":["https://vuldb.com/vuln/361907","https://vuldb.com/vuln/361907/cti","https://vuldb.com/submit/808421","https://github.com/open5gs/open5gs/issues/4432","https://github.com/open5gs/open5gs/"],"weaknesses":["CWE-404"],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/8xxx/CVE-2026-8120.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-8120","state":"PUBLISHED","datePublished":"2026-05-08T00:15:09.713Z","dateUpdated":"2026-05-08T20:19:08.468Z","assignerShortName":"VulDB","assignerOrgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateReserved":"2026-05-07T16:56:44.589Z"},"containers":{"cna":{"title":"Open5GS NSSF nnssf-handler.c denial of service","descriptions":[{"lang":"en","value":"A flaw has been found in Open5GS up to 2.7.7. The affected element is the function nssf_nnrf_nsselection_handle_get_from_amf_or_vnssf of the file /src/nssf/nnssf-handler.c of the component NSSF. Executing a manipulation can lead to denial of service. The attack can be executed remotely. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet."}],"affected":[{"vendor":"n/a","product":"Open5GS","versions":[{"version":"2.7.0","status":"affected"},{"version":"2.7.1","status":"affected"},{"version":"2.7.2","status":"affected"},{"version":"2.7.3","status":"affected"},{"version":"2.7.4","status":"affected"},{"version":"2.7.5","status":"affected"},{"version":"2.7.6","status":"affected"},{"version":"2.7.7","status":"affected"}],"cpes":["cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:*"],"modules":["NSSF"]}],"references":[{"url":"https://vuldb.com/vuln/361907","name":"VDB-361907 | Open5GS NSSF nnssf-handler.c denial of service","tags":["vdb-entry","technical-description"]},{"url":"https://vuldb.com/vuln/361907/cti","name":"VDB-361907 | CTI Indicators (IOB, IOC, TTP, IOA)","tags":["signature","permissions-required"]},{"url":"https://vuldb.com/submit/808421","name":"Submit #808421 | Open5gs NSSF v2.7.7 Denial of Service","tags":["third-party-advisory"]},{"url":"https://github.com/open5gs/open5gs/issues/4432","tags":["exploit","issue-tracking"]},{"url":"https://github.com/open5gs/open5gs/","tags":["product"]}],"metrics":[{"cvssV4_0":{"version":"4.0","baseScore":5.3,"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","baseSeverity":"MEDIUM"}},{"cvssV3_1":{"version":"3.1","baseScore":4.3,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R","baseSeverity":"MEDIUM"}},{"cvssV3_0":{"version":"3.0","baseScore":4.3,"vectorString":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R","baseSeverity":"MEDIUM"}},{"cvssV2_0":{"version":"2.0","baseScore":4,"vectorString":"AV:N/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-404","type":"CWE","lang":"en","description":"Denial of Service"}]}],"providerMetadata":{"shortName":"VulDB","orgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateUpdated":"2026-05-08T00:15:09.713Z"},"timeline":[{"time":"2026-05-07T00:00:00.000Z","lang":"en","value":"Advisory disclosed"},{"time":"2026-05-07T02:00:00.000Z","lang":"en","value":"VulDB entry created"},{"time":"2026-05-07T19:01:59.000Z","lang":"en","value":"VulDB entry last update"}],"credits":[{"lang":"en","value":"FrankyLin (VulDB User)","type":"reporter"},{"lang":"en","value":"VulDB CNA Team","type":"coordinator"}]},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://vuldb.com/submit/808421","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-08T20:18:46.648463Z","id":"CVE-2026-8120","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-08T20:19:08.468Z"}}]}}}