{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-65612", "assignerOrgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6", "state": "PUBLISHED", "assignerShortName": "CERT-PL", "dateReserved": "2026-07-22T10:59:31.847Z", "datePublished": "2026-08-19T13:21:32.599Z", "dateUpdated": "2026-08-19T13:21:32.599Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6", "shortName": "CERT-PL", "dateUpdated": "2026-08-19T13:21:32.599Z"}, "title": "Shell Command Injection in nnn", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-78", "description": "CWE-78 Improper neutralization of special elements used in an OS command ('OS command injection')", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-88", "descriptions": [{"lang": "en", "value": "CAPEC-88 OS Command Injection"}]}], "affected": [{"vendor": "nnn", "product": "nnn", "repo": "https://github.com/jarun/nnn", "versions": [{"status": "affected", "version": "5.2", "versionType": "git"}], "defaultStatus": "unknown"}], "descriptions": [{"lang": "en", "value": "nnn does not sanitize the filename variable. An attacker can place a file with a crafted name on a shared filesystem, removable media, or inside an extracted archive\u00a0whose name contains a single quote followed\u00a0by shell syntax. If the victim navigates\nto that file and opens it with preview-tabbed, the filename is embedded into the\u00a0generated shell command and the injected payload executes with the privileges of the nnn process.\n\n\n\nMaintainer of this project was notified about this vulnerability. It might has been addressed, but the maintainer did not provide a vulnerable version range. Only version 5.2 was tested and confirmed as vulnerable.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "nnn does not sanitize the filename variable. An attacker can place a file with a crafted name on a shared filesystem, removable media, or inside an extracted archive&nbsp;whose name contains a single quote followed&nbsp;by shell syntax. If the victim navigates<br>to that file and opens it with preview-tabbed, the filename is embedded into the&nbsp;generated shell command and the injected payload executes with the privileges of the nnn process.<br><div><br></div><div>Maintainer of this project was notified about this vulnerability<span>. It might has been addressed, but the maintainer did not provide a vulnerable version range. Only version 5.2 was tested and confirmed as vulnerable.</span></div>"}]}], "tags": ["x_open-source"], "references": [{"url": "https://cert.pl/en/posts/2026/08/CVE-2026-65609", "tags": ["third-party-advisory"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "subIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subAvailabilityImpact": "LOW", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "MEDIUM", "baseScore": 5.1, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L"}}], "credits": [{"lang": "en", "value": "Micha\u0142 Majchrowicz (AFINE Team)", "type": "finder"}, {"lang": "en", "value": "Marcin Wyczechowski (AFINE Team)", "type": "finder"}], "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.3"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unknown", "product": "nnn", "repo": "https://github.com/jarun/nnn", "vendor": "nnn", "versions": [{"status": "affected", "version": "5.2", "versionType": "git"}]}], "source": "cvd@cert.pl"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "nnn does not sanitize the filename variable. An attacker can place a file with a crafted name on a shared filesystem, removable media, or inside an extracted archive\u00a0whose name contains a single quote followed\u00a0by shell syntax. If the victim navigates\nto that file and opens it with preview-tabbed, the filename is embedded into the\u00a0generated shell command and the injected payload executes with the privileges of the nnn process.\n\n\n\nMaintainer of this project was notified about this vulnerability. It might has been addressed, but the maintainer did not provide a vulnerable version range. Only version 5.2 was tested and confirmed as vulnerable."}], "id": "CVE-2026-65612", "lastModified": "2026-08-19T14:17:38.523", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.1, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "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": "LOW", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "userInteraction": "ACTIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L/E:X/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": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cvd@cert.pl", "type": "Secondary"}]}, "published": "2026-08-19T14:17:38.523", "references": [{"source": "cvd@cert.pl", "url": "https://cert.pl/en/posts/2026/08/CVE-2026-65609"}], "sourceIdentifier": "cvd@cert.pl", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-78"}], "source": "cvd@cert.pl", "type": "Primary"}]}

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