{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-80427", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-08-26T10:43:43.830Z", "datePublished": "2026-08-26T15:44:55.220Z", "dateUpdated": "2026-08-29T11:48:06.751Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-08-29T11:48:06.751Z" }, "datePublic": "2026-08-26T00:00:00.000Z", "title": "bestzip before 2.2.6 and 3.0.x before 3.0.2 Argument Injection via Missing Option Delimiter", "descriptions": [ { "lang": "en", "value": "bestzip builds the argument list for the system zip utility without separating options from operands. The destination archive path and the caller-supplied source paths are passed to the child process with no -- delimiter between them, so any source entry beginning with a hyphen is interpreted by zip as an option rather than a file name. zip accepts -T to test the finished archive and -TT to name the command used to perform that test, so a source list containing those two entries and a command string causes zip to run that command through a shell once the archive has been written. An application that passes a file name or path it received from an untrusted source into the bestzip API therefore executes a command of the supplier's choosing. Versions 2.2.6 and 3.0.2 add the delimiter." } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "cweId": "CWE-88", "description": "Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')", "type": "CWE" } ] } ], "affected": [ { "vendor": "nfriedly", "product": "bestzip", "collectionURL": "https://github.com/nfriedly/node-bestzip", "repo": "https://github.com/nfriedly/node-bestzip", "defaultStatus": "unaffected", "versions": [ { "version": "0", "lessThan": "2.2.6", "status": "affected", "versionType": "semver" }, { "version": "3.0.0", "lessThan": "3.0.2", "status": "affected", "versionType": "semver" } ], "packageURL": "pkg:npm/bestzip" } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:a:bestzip_project:bestzip:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.2.6" }, { "vulnerable": true, "criteria": "cpe:2.3:a:bestzip_project:bestzip:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0.0", "versionEndExcluding": "3.0.2" } ] } ] } ], "metrics": [ { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV4_0": { "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "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": "HIGH", "baseScore": 8.6, "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N" } }, { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV3_1": { "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "version": "3.1", "baseSeverity": "HIGH", "baseScore": 8.4, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H" } } ], "references": [ { "url": "https://github.com/nfriedly/node-bestzip", "tags": [ "product" ] }, { "url": "https://github.com/nfriedly/node-bestzip/security/advisories/GHSA-p87m-9567-rgcc", "name": "GitHub Security Advisory (GHSA-p87m-9567-rgcc)", "tags": [ "vendor-advisory" ] }, { "url": "https://www.npmjs.com/package/bestzip", "tags": [ "product" ] }, { "name": "VulnCheck Advisory: bestzip before 2.2.6 and 3.0.x before 3.0.2 Argument Injection via Missing Option Delimiter", "tags": [ "third-party-advisory" ], "url": "https://www.vulncheck.com/advisories/bestzip-before-2.2.6-and-3.0-x-before-3.0.2-argument-injection-via-missing-option-delimiter" } ], "credits": [ { "lang": "en", "value": "poqpwppy", "type": "finder" } ], "x_generator": { "engine": "vulncheck-endgame" }, "source": { "discovery": "UNKNOWN" } }, "adp": [ { "references": [ { "url": "https://github.com/nfriedly/node-bestzip/security/advisories/GHSA-p87m-9567-rgcc", "tags": [ "exploit" ] } ], "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-08-26T16:03:42.714702Z", "id": "CVE-2026-80427", "options": [ { "Exploitation": "poc" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-26T16:03:50.147Z" } } ] } }