CVE-2026-8746

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-8746", "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "state": "PUBLISHED", "assignerShortName": "VulDB", "dateReserved": "2026-05-16T12:38:45.771Z", "datePublished": "2026-05-17T10:15:08.674Z", "dateUpdated": "2026-05-18T20:07:35.643Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "shortName": "VulDB", "dateUpdated": "2026-05-17T10:15:08.674Z"}, "title": "Open5GS NRF nghttp2-server.c discover_handler use after free", "problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-416", "lang": "en", "description": "Use After Free"}]}, {"descriptions": [{"type": "CWE", "cweId": "CWE-119", "lang": "en", "description": "Memory Corruption"}]}], "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": ["NRF"]}], "descriptions": [{"lang": "en", "value": "A security flaw has been discovered in Open5GS up to 2.7.7. Affected by this issue is the function discover_handler in the library /lib/sbi/nghttp2-server.c of the component NRF. The manipulation results in use after free. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet."}], "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"}}], "timeline": [{"time": "2026-05-16T00:00:00.000Z", "lang": "en", "value": "Advisory disclosed"}, {"time": "2026-05-16T02:00:00.000Z", "lang": "en", "value": "VulDB entry created"}, {"time": "2026-05-16T14:43:50.000Z", "lang": "en", "value": "VulDB entry last update"}], "credits": [{"lang": "en", "value": "ZiyuLin (VulDB User)", "type": "reporter"}, {"lang": "en", "value": "VulDB CNA Team", "type": "coordinator"}], "references": [{"url": "https://vuldb.com/vuln/364333", "name": "VDB-364333 | Open5GS NRF nghttp2-server.c discover_handler use after free", "tags": ["vdb-entry", "technical-description"]}, {"url": "https://vuldb.com/vuln/364333/cti", "name": "VDB-364333 | CTI Indicators (IOB, IOC, IOA)", "tags": ["signature", "permissions-required"]}, {"url": "https://vuldb.com/submit/817032", "name": "Submit #817032 | Open5GS NRF v2.7.7 Denial of Service", "tags": ["third-party-advisory"]}, {"url": "https://github.com/open5gs/open5gs/issues/4476", "tags": ["exploit", "issue-tracking"]}, {"url": "https://github.com/open5gs/open5gs/", "tags": ["product"]}]}, "adp": [{"references": [{"url": "https://vuldb.com/submit/817032", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-18T20:06:33.437890Z", "id": "CVE-2026-8746", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-18T20:07:35.643Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-8746", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-18T20:06:33.437890Z"}}}], "references": [{"url": "https://vuldb.com/submit/817032", "tags": ["exploit"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-18T20:06:09.572Z"}}], "cna": {"title": "Open5GS NRF nghttp2-server.c discover_handler use after free", "credits": [{"lang": "en", "type": "reporter", "value": "ZiyuLin (VulDB User)"}, {"lang": "en", "type": "coordinator", "value": "VulDB CNA Team"}], "metrics": [{"cvssV4_0": {"version": "4.0", "baseScore": 5.3, "baseSeverity": "MEDIUM", "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"}}, {"cvssV3_1": {"version": "3.1", "baseScore": 4.3, "baseSeverity": "MEDIUM", "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"}}, {"cvssV3_0": {"version": "3.0", "baseScore": 4.3, "baseSeverity": "MEDIUM", "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"}}, {"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"}}], "affected": [{"cpes": ["cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:*"], "vendor": "n/a", "modules": ["NRF"], "product": "Open5GS", "versions": [{"status": "affected", "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"}]}], "timeline": [{"lang": "en", "time": "2026-05-16T00:00:00.000Z", "value": "Advisory disclosed"}, {"lang": "en", "time": "2026-05-16T02:00:00.000Z", "value": "VulDB entry created"}, {"lang": "en", "time": "2026-05-16T14:43:50.000Z", "value": "VulDB entry last update"}], "references": [{"url": "https://vuldb.com/vuln/364333", "name": "VDB-364333 | Open5GS NRF nghttp2-server.c discover_handler use after free", "tags": ["vdb-entry", "technical-description"]}, {"url": "https://vuldb.com/vuln/364333/cti", "name": "VDB-364333 | CTI Indicators (IOB, IOC, IOA)", "tags": ["signature", "permissions-required"]}, {"url": "https://vuldb.com/submit/817032", "name": "Submit #817032 | Open5GS NRF v2.7.7 Denial of Service", "tags": ["third-party-advisory"]}, {"url": "https://github.com/open5gs/open5gs/issues/4476", "tags": ["exploit", "issue-tracking"]}, {"url": "https://github.com/open5gs/open5gs/", "tags": ["product"]}], "descriptions": [{"lang": "en", "value": "A security flaw has been discovered in Open5GS up to 2.7.7. Affected by this issue is the function discover_handler in the library /lib/sbi/nghttp2-server.c of the component NRF. The manipulation results in use after free. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "Use After Free"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-119", "description": "Memory Corruption"}]}], "providerMetadata": {"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "shortName": "VulDB", "dateUpdated": "2026-05-17T10:15:08.674Z"}}}, "cveMetadata": {"cveId": "CVE-2026-8746", "state": "PUBLISHED", "dateUpdated": "2026-05-18T20:07:35.643Z", "dateReserved": "2026-05-16T12:38:45.771Z", "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "datePublished": "2026-05-17T10:15:08.674Z", "assignerShortName": "VulDB"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"cpes": ["cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:*"], "modules": ["NRF"], "product": "Open5GS", "vendor": "n/a", "versions": [{"status": "affected", "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"}]}], "source": "cna@vuldb.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:*", "matchCriteriaId": "0A46BC99-08E7-4D40-A908-76121E4AFCD5", "versionEndIncluding": "2.7.7", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A security flaw has been discovered in Open5GS up to 2.7.7. Affected by this issue is the function discover_handler in the library /lib/sbi/nghttp2-server.c of the component NRF. The manipulation results in use after free. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet."}, {"lang": "es", "value": "Se ha descubierto una falla de seguridad en Open5GS hasta la versi\u00f3n 2.7.7. Este problema afecta a la funci\u00f3n discover_handler en la biblioteca /lib/sbi/nghttp2-server.c del componente NRF. La manipulaci\u00f3n resulta en use after free. El ataque puede lanzarse de forma remota. El exploit ha sido publicado y puede ser utilizado para ataques. Se inform\u00f3 al proyecto del problema con antelaci\u00f3n mediante un reporte de incidencia, pero a\u00fan no ha respondido."}], "id": "CVE-2026-8746", "lastModified": "2026-11-11T20:10:00.273", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "PARTIAL", "baseScore": 4.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 8.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "cna@vuldb.com", "type": "Secondary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "cna@vuldb.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 2.1, "baseSeverity": "LOW", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "PROOF_OF_CONCEPT", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "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", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cna@vuldb.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-8746", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-05-18T20:06:33.437890Z", "version": "2.0.3"}}]}, "published": "2026-05-17T11:16:35.110", "references": [{"source": "cna@vuldb.com", "tags": ["Product"], "url": "https://github.com/open5gs/open5gs/"}, {"source": "cna@vuldb.com", "tags": ["Exploit", "Issue Tracking"], "url": "https://github.com/open5gs/open5gs/issues/4476"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/submit/817032"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/vuln/364333"}, {"source": "cna@vuldb.com", "tags": ["Permissions Required", "VDB Entry"], "url": "https://vuldb.com/vuln/364333/cti"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/submit/817032"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}, {"lang": "en", "value": "CWE-416"}], "source": "cna@vuldb.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.7.0"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.7.1"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.7.2"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.7.3"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.7.4"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.7.5"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.7.6"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.7.7"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Open5GS", "source": "cna", "vendor": "n/a"}, "product": "open5gs", "vendor": "open5gs"}], "created": "2026-05-17T11:30:15.697782+00:00", "updated": "2026-05-17T11:30:15.929495+00:00", "vendors": ["open5gs", "open5gs$PRODUCT$open5gs"]}