Vulnerability-Lookup

GHSA-PF92-M78R-H85C

Vulnerability from github – Published: 2026-09-09 12:32 – Updated: 2026-09-09 12:32

Details

bestzip versions 2.2.6 and 3.0.2 contain an argument injection vulnerability in the nativeZip function that allows attackers to inject arbitrary arguments to the Info-ZIP backend. Attackers can supply a malicious destination path combined with crafted source entries to execute arbitrary commands with Node.js process privileges. Fixed in 2.2.7 and 3.0.3.

Severity

8.4 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

8.6 (High)


                  
                    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

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-87794"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-88"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-09T10:22:34Z",
    "severity": "HIGH"
  },
  "details": "bestzip versions 2.2.6 and 3.0.2 contain an argument injection vulnerability in the nativeZip function that allows attackers to inject arbitrary arguments to the Info-ZIP backend. Attackers can supply a malicious destination path combined with crafted source entries to execute arbitrary commands with Node.js process privileges. Fixed in 2.2.7 and 3.0.3.",
  "id": "GHSA-pf92-m78r-h85c",
  "modified": "2026-09-09T12:32:11Z",
  "published": "2026-09-09T12:32:11Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/nfriedly/node-bestzip/security/advisories/GHSA-p87m-9567-rgcc"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nfriedly/node-bestzip/security/advisories/GHSA-xhwx-rch4-ph2v"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-87794"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nfriedly/node-bestzip/commit/2adb637b0acb05b8475de7db5af4b86ffcf40aaf"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nfriedly/node-bestzip"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nfriedly/node-bestzip/blob/v3.0.2/lib/bestzip.js"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/package/bestzip"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/bestzip-2.2.6-and-3.0.2-argument-injection-via-the-native-zip-destination"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "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/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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-87794 (GCVE-0-2026-87794)

Vulnerability from cvelistv5 – Published: 2026-09-09 10:07 – Updated: 2026-09-09 10:07

Title

bestzip 2.2.6 and 3.0.2 Argument Injection via the Native Zip Destination

Summary

Severity

8.6 (High)


                        
                          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

8.4 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-88 - Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')

Assigner

VulnCheck mitre root

References

7 references

URL	Tags
https://github.com/nfriedly/node-bestzip/security…	vendor-advisory
https://github.com/nfriedly/node-bestzip/commit/2…	patch
https://github.com/nfriedly/node-bestzip/blob/v3.…	technical-description
https://github.com/nfriedly/node-bestzip/security…	relatedvendor-advisory
https://www.npmjs.com/package/bestzip	product
https://github.com/nfriedly/node-bestzip	product
https://www.vulncheck.com/advisories/bestzip-2.2.…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
nfriedly	bestzip	Affected: 2.2.6 , < 2.2.7 (semver) Affected: 3.0.2 , < 3.0.3 (semver) cpe:2.3:a:bestzip_project:bestzip:::::::: cpe:2.3:a:bestzip_project:bestzip::::::::

Date Public

2026-08-28 00:00

Credits

iamabighotdog

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://www.npmjs.com/package/bestzip",
          "defaultStatus": "unaffected",
          "packageURL": "pkg:npm/bestzip",
          "product": "bestzip",
          "repo": "https://github.com/nfriedly/node-bestzip",
          "vendor": "nfriedly",
          "versions": [
            {
              "lessThan": "2.2.7",
              "status": "affected",
              "version": "2.2.6",
              "versionType": "semver"
            },
            {
              "lessThan": "3.0.3",
              "status": "affected",
              "version": "3.0.2",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:bestzip_project:bestzip:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "2.2.7",
                  "versionStartIncluding": "2.2.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:bestzip_project:bestzip:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "3.0.3",
                  "versionStartIncluding": "3.0.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "iamabighotdog"
        }
      ],
      "datePublic": "2026-08-28T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "bestzip versions 2.2.6 and 3.0.2 contain an argument injection vulnerability in the nativeZip function that allows attackers to inject arbitrary arguments to the Info-ZIP backend. Attackers can supply a malicious destination path combined with crafted source entries to execute arbitrary commands with Node.js process privileges. Fixed in 2.2.7 and 3.0.3."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          },
          "format": "CVSS"
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 8.4,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-88",
              "description": "Improper Neutralization of Argument Delimiters in a Command (\u0027Argument Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-09T10:07:27.925Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "GitHub Security Advisory (GHSA-xhwx-rch4-ph2v)",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/nfriedly/node-bestzip/security/advisories/GHSA-xhwx-rch4-ph2v"
        },
        {
          "name": "Fix commit (2.2.7, 3.0.3)",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/nfriedly/node-bestzip/commit/2adb637b0acb05b8475de7db5af4b86ffcf40aaf"
        },
        {
          "name": "Vulnerable nativeZip argument list at v3.0.2",
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/nfriedly/node-bestzip/blob/v3.0.2/lib/bestzip.js"
        },
        {
          "name": "GitHub Security Advisory (GHSA-p87m-9567-rgcc)",
          "tags": [
            "related",
            "vendor-advisory"
          ],
          "url": "https://github.com/nfriedly/node-bestzip/security/advisories/GHSA-p87m-9567-rgcc"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://www.npmjs.com/package/bestzip"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/nfriedly/node-bestzip"
        },
        {
          "name": "VulnCheck Advisory: bestzip 2.2.6 and 3.0.2 Argument Injection via the Native Zip Destination",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/bestzip-2.2.6-and-3.0.2-argument-injection-via-the-native-zip-destination"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "bestzip 2.2.6 and 3.0.2 Argument Injection via the Native Zip Destination",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-87794",
    "datePublished": "2026-09-09T10:07:27.925Z",
    "dateReserved": "2026-09-09T09:37:54.271Z",
    "dateUpdated": "2026-09-09T10:07:27.925Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

GHSA-PF92-M78R-H85C

CVE-2026-87794 (GCVE-0-2026-87794)

Tags

Sightings

Nomenclature