CVE-2026-84427

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-84427", "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "state": "PUBLISHED", "assignerShortName": "VulDB", "dateReserved": "2026-09-01T18:15:51.244Z", "datePublished": "2026-09-02T00:30:07.139Z", "dateUpdated": "2026-09-04T02:18:31.810Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "shortName": "VulDB", "dateUpdated": "2026-09-02T00:30:07.139Z"}, "title": "zhayujie CowAgent Bash Tool bash.py denial of service", "problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-404", "lang": "en", "description": "Denial of Service"}]}], "affected": [{"vendor": "zhayujie", "product": "CowAgent", "versions": [{"version": "2.1.0", "status": "affected"}, {"version": "2.1.1", "status": "affected"}, {"version": "2.1.2", "status": "affected"}, {"version": "2.1.3", "status": "affected"}, {"version": "2.1.4", "status": "affected"}, {"version": "2.1.5", "status": "affected"}, {"version": "2.1.6", "status": "affected"}, {"version": "2.1.7", "status": "affected"}], "cpes": ["cpe:2.3:a:zhayujie:cowagent:*:*:*:*:*:*:*:*"], "modules": ["Bash Tool"]}], "descriptions": [{"lang": "en", "value": "A vulnerability was determined in zhayujie CowAgent up to 2.1.7. Affected is an unknown function of the file agent/tools/bash/bash.py of the component Bash Tool. Executing a manipulation can lead to denial of service. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way."}], "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": "2026-09-01T00:00:00.000Z", "lang": "en", "value": "Advisory disclosed"}, {"time": "2026-09-01T02:00:00.000Z", "lang": "en", "value": "VulDB entry created"}, {"time": "2026-09-01T20:20:56.000Z", "lang": "en", "value": "VulDB entry last update"}], "credits": [{"lang": "en", "value": "outlookgp (VulDB User)", "type": "reporter"}, {"lang": "en", "value": "VulDB CNA Team", "type": "coordinator"}], "references": [{"url": "https://vuldb.com/vuln/397793", "name": "VDB-397793 | zhayujie CowAgent Bash Tool bash.py denial of service", "tags": ["vdb-entry"]}, {"url": "https://vuldb.com/vuln/397793/cti", "name": "VDB-397793 | CTI Indicators (IOB, IOC, TTP, IOA)", "tags": ["signature", "permissions-required"]}, {"url": "https://vuldb.com/cve/CVE-2026-84427", "name": "CVE-2026-84427 | CVE Analysis and Report", "tags": ["third-party-advisory"]}, {"url": "https://vuldb.com/submit/884137", "name": "Submit #884137 | zhayujie CowAgent 2.1.3 Denial of Service", "tags": ["third-party-advisory"]}, {"url": "https://github.com/outlookgp/CVE/tree/main/CowAgent_Bash_Output_Buffer_DoS_Report", "tags": ["exploit"]}], "x_generator": ["VulDB PVTS v202609"]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-04T02:18:22.734662Z", "id": "CVE-2026-84427", "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": "2026-09-04T02:18:31.810Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-84427", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-04T02:18:22.734662Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-04T02:18:27.536Z"}}], "cna": {"title": "zhayujie CowAgent Bash Tool bash.py denial of service", "credits": [{"lang": "en", "type": "reporter", "value": "outlookgp (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:zhayujie:cowagent:*:*:*:*:*:*:*:*"], "vendor": "zhayujie", "modules": ["Bash Tool"], "product": "CowAgent", "versions": [{"status": "affected", "version": "2.1.0"}, {"status": "affected", "version": "2.1.1"}, {"status": "affected", "version": "2.1.2"}, {"status": "affected", "version": "2.1.3"}, {"status": "affected", "version": "2.1.4"}, {"status": "affected", "version": "2.1.5"}, {"status": "affected", "version": "2.1.6"}, {"status": "affected", "version": "2.1.7"}]}], "timeline": [{"lang": "en", "time": "2026-09-01T00:00:00.000Z", "value": "Advisory disclosed"}, {"lang": "en", "time": "2026-09-01T02:00:00.000Z", "value": "VulDB entry created"}, {"lang": "en", "time": "2026-09-01T20:20:56.000Z", "value": "VulDB entry last update"}], "references": [{"url": "https://vuldb.com/vuln/397793", "name": "VDB-397793 | zhayujie CowAgent Bash Tool bash.py denial of service", "tags": ["vdb-entry"]}, {"url": "https://vuldb.com/vuln/397793/cti", "name": "VDB-397793 | CTI Indicators (IOB, IOC, TTP, IOA)", "tags": ["signature", "permissions-required"]}, {"url": "https://vuldb.com/cve/CVE-2026-84427", "name": "CVE-2026-84427 | CVE Analysis and Report", "tags": ["third-party-advisory"]}, {"url": "https://vuldb.com/submit/884137", "name": "Submit #884137 | zhayujie CowAgent 2.1.3 Denial of Service", "tags": ["third-party-advisory"]}, {"url": "https://github.com/outlookgp/CVE/tree/main/CowAgent_Bash_Output_Buffer_DoS_Report", "tags": ["exploit"]}], "x_generator": ["VulDB PVTS v202609"], "descriptions": [{"lang": "en", "value": "A vulnerability was determined in zhayujie CowAgent up to 2.1.7. Affected is an unknown function of the file agent/tools/bash/bash.py of the component Bash Tool. Executing a manipulation can lead to denial of service. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-404", "description": "Denial of Service"}]}], "providerMetadata": {"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "shortName": "VulDB", "dateUpdated": "2026-09-02T00:30:07.139Z"}}}, "cveMetadata": {"cveId": "CVE-2026-84427", "state": "PUBLISHED", "dateUpdated": "2026-09-04T02:18:31.810Z", "dateReserved": "2026-09-01T18:15:51.244Z", "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "datePublished": "2026-09-02T00:30:07.139Z", "assignerShortName": "VulDB"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"cpes": ["cpe:2.3:a:zhayujie:cowagent:*:*:*:*:*:*:*:*"], "modules": ["Bash Tool"], "product": "CowAgent", "vendor": "zhayujie", "versions": [{"status": "affected", "version": "2.1.0"}, {"status": "affected", "version": "2.1.1"}, {"status": "affected", "version": "2.1.2"}, {"status": "affected", "version": "2.1.3"}, {"status": "affected", "version": "2.1.4"}, {"status": "affected", "version": "2.1.5"}, {"status": "affected", "version": "2.1.6"}, {"status": "affected", "version": "2.1.7"}]}], "source": "cna@vuldb.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability was determined in zhayujie CowAgent up to 2.1.7. Affected is an unknown function of the file agent/tools/bash/bash.py of the component Bash Tool. Executing a manipulation can lead to denial of service. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way."}], "id": "CVE-2026-84427", "lastModified": "2026-09-04T03:17:44.187", "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"}], "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-2026-84427", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-04T02:18:22.734662Z", "version": "2.0.3"}}]}, "published": "2026-09-02T01:17:23.887", "references": [{"source": "cna@vuldb.com", "url": "https://github.com/outlookgp/CVE/tree/main/CowAgent_Bash_Output_Buffer_DoS_Report"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/cve/CVE-2026-84427"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/submit/884137"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/vuln/397793"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/vuln/397793/cti"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-404"}], "source": "cna@vuldb.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.1.0"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.1.1"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.1.2"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.1.3"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.1.4"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.1.5"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.1.6"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.1.7"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "CowAgent", "source": "cna", "vendor": "zhayujie"}, "product": "cowagent", "vendor": "zhayujie"}], "created": "2026-09-02T02:00:11.941580+00:00", "updated": "2026-09-02T04:00:09.245467+00:00", "vendors": ["zhayujie", "zhayujie$PRODUCT$cowagent"]}