{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-122020", "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "state": "PUBLISHED", "assignerShortName": "VulDB", "dateReserved": "2026-11-04T14:37:14.112Z", "datePublished": "2026-11-04T22:00:18.641Z", "dateUpdated": "2026-11-06T09:07:33.450Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "shortName": "VulDB", "dateUpdated": "2026-11-06T09:07:33.450Z"}, "title": "NST Labs Tech Nstbrowser Local Agent Management Service stopAll stopAllBrowsers denial of service", "problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-404", "lang": "en", "description": "Denial of Service"}]}], "affected": [{"vendor": "NST Labs Tech", "product": "Nstbrowser", "versions": [{"version": "1.2.0", "status": "affected"}, {"version": "1.2.1", "status": "affected"}], "cpes": ["cpe:2.3:a:nst_labs_tech:nstbrowser:*:*:*:*:*:*:*:*"], "modules": ["Local Agent Management Service"]}], "descriptions": [{"lang": "en", "value": "A security flaw has been discovered in NST Labs Tech Nstbrowser up to 1.2.1. The affected element is the function stopAllBrowsers of the file /api/agent/browser/stopAll of the component Local Agent Management Service. Performing a manipulation results in denial of service. Remote exploitation of the attack is possible. The exploit has been released to the public and may be used for attacks. 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:N/UI:P/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:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C", "baseSeverity": "MEDIUM"}}, {"cvssV3_0": {"version": "3.0", "baseScore": 4.3, "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C", "baseSeverity": "MEDIUM"}}, {"cvssV2_0": {"version": "2.0", "baseScore": 5, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:ND/RC:C"}}], "timeline": [{"time": "2026-11-04T00:00:00.000Z", "lang": "en", "value": "Advisory disclosed"}, {"time": "2026-11-04T01:00:00.000Z", "lang": "en", "value": "VulDB entry created"}, {"time": "2026-11-06T10:09:24.000Z", "lang": "en", "value": "VulDB entry last update"}], "credits": [{"lang": "en", "value": "Notwo1f", "type": "finder"}, {"lang": "en", "value": "wilson888 (VulDB User)", "type": "reporter"}, {"lang": "en", "value": "wilson888 (VulDB User)", "type": "analyst"}, {"lang": "en", "value": "VulDB CNA Team", "type": "coordinator"}], "references": [{"url": "https://vuldb.com/vuln/431086", "name": "VDB-431086 | NST Labs Tech Nstbrowser Local Agent Management Service stopAll stopAllBrowsers denial of service", "tags": ["vdb-entry", "technical-description"]}, {"url": "https://vuldb.com/vuln/431086/cti", "name": "VDB-431086 | CTI Indicators (IOB, IOC, TTP, IOA)", "tags": ["signature", "permissions-required"]}, {"url": "https://vuldb.com/cve/CVE-2026-122020", "name": "CVE-2026-122020 | CVE Analysis and Report", "tags": ["third-party-advisory"]}, {"url": "https://vuldb.com/submit/1024994", "name": "Submit #1024994 | https://www.nstbrowser.io/en nstbroswer 1.2.1 DDOS", "tags": ["third-party-advisory"]}, {"url": "https://drive.google.com/drive/folders/1TzU1aHKabEHbMmSbqVR4HhxTAxKO6XII?usp=drive_link", "tags": ["related"]}, {"url": "https://drive.google.com/drive/folders/1TzU1aHKabEHbMmSbqVR4HhxTAxKO6XII", "tags": ["exploit"]}], "x_generator": ["VulDB PVTS v202611"]}}}

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{"affected": [{"affectedData": [{"cpes": ["cpe:2.3:a:nst_labs_tech:nstbrowser:*:*:*:*:*:*:*:*"], "modules": ["Local Agent Management Service"], "product": "Nstbrowser", "vendor": "NST Labs Tech", "versions": [{"status": "affected", "version": "1.2.0"}, {"status": "affected", "version": "1.2.1"}]}], "source": "cna@vuldb.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A security flaw has been discovered in NST Labs Tech Nstbrowser up to 1.2.1. The affected element is the function stopAllBrowsers of the file /api/agent/browser/stopAll of the component Local Agent Management Service. Performing a manipulation results in denial of service. Remote exploitation of the attack is possible. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way."}], "id": "CVE-2026-122020", "lastModified": "2026-11-04T22:17:56.323", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "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": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "cna@vuldb.com", "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": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/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"}]}, "published": "2026-11-04T22:17:56.157", "references": [{"source": "cna@vuldb.com", "url": "https://drive.google.com/drive/folders/1TzU1aHKabEHbMmSbqVR4HhxTAxKO6XII"}, {"source": "cna@vuldb.com", "url": "https://drive.google.com/drive/folders/1TzU1aHKabEHbMmSbqVR4HhxTAxKO6XII?usp=drive_link"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/cve/CVE-2026-122020"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/submit/1024994"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/vuln/431086"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/vuln/431086/cti"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-404"}], "source": "cna@vuldb.com", "type": "Primary"}]}

{"bugzilla": {"description": "nstbrowser: nstbrowser: Denial of Service via stopAll API endpoint", "id": "2567783", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2567783"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-306", "details": ["A security flaw has been discovered in NST Labs Tech Nstbrowser up to 1.2.1. The affected element is the function stopAllBrowsers of the file /api/agent/browser/stopAll of the component Local Agent Management Service. Performing a manipulation results in denial of service. Remote exploitation of the attack is possible. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.", "A flaw was found in Nstbrowser. A remote attacker could exploit this vulnerability by sending a crafted request to the stopAll API endpoint within the Local Agent Management Service. Successful exploitation allows the attacker to terminate active browser instances, resulting in a Denial of Service (DoS)."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-122020", "public_date": "2026-11-04T22:00:18Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-122020\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-122020\nhttps://drive.google.com/drive/folders/1TzU1aHKabEHbMmSbqVR4HhxTAxKO6XII\nhttps://drive.google.com/drive/folders/1TzU1aHKabEHbMmSbqVR4HhxTAxKO6XII?usp=drive_link\nhttps://vuldb.com/cve/CVE-2026-122020\nhttps://vuldb.com/submit/1024994\nhttps://vuldb.com/vuln/431086\nhttps://vuldb.com/vuln/431086/cti"], "statement": "This vulnerability is rated with Moderate severity because exploitation requires user interaction and is limited to causing a denial of service on the browser service without impacting data confidentiality or integrity. Additionally, Nstbrowser is not packaged, shipped, or supported in Red Hat products. As a result, this issue does not affect any supported Red Hat software.", "threat_severity": "Moderate"}

{"created": "2026-11-04T23:30:12.410249+00:00", "updated": "2026-11-06T14:45:05.210674+00:00", "vendors": []}