Vulnerability-Lookup

GHSA-7PQW-9J4J-H8Q3

Vulnerability from github – Published: 2026-08-17 15:30 – Updated: 2026-08-17 15:30

Details

extract-zip through 2.0.1 containment-checks only the parent directory of each archive entry and never the entry's own final path component, so an archive containing two entries with identical names - a symlink whose target is outside the destination, followed by a regular file - writes through the planted symlink and yields an arbitrary file write outside the destination directory.

Severity

8.1 (High)


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

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-19693"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-17T14:20:20Z",
    "severity": "HIGH"
  },
  "details": "extract-zip through 2.0.1 containment-checks only the parent directory of each archive entry and never the entry\u0027s own final path component, so an archive containing two entries with identical names - a symlink whose target is outside the destination, followed by a regular file - writes through the planted symlink and yields an arbitrary file write outside the destination directory.",
  "id": "GHSA-7pqw-9j4j-h8q3",
  "modified": "2026-08-17T15:30:40Z",
  "published": "2026-08-17T15:30:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-19693"
    },
    {
      "type": "WEB",
      "url": "https://github.com/max-mapper/extract-zip"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/package/extract-zip"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-19693 (GCVE-0-2026-19693)

Vulnerability from cvelistv5 – Published: 2026-08-17 13:30 – Updated: 2026-08-17 16:00 Unsupported When Assigned

Title

extract-zip arbitrary file write outside the destination directory via a symlink at the final path component

Summary

Severity

8.1 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-17 16:00 UTC

CWE

CWE-59 - Improper Link Resolution Before File Access ('Link Following')
CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

seal mitre root

References

2 references

URL	Tags
https://www.npmjs.com/package/extract-zip	product
https://github.com/max-mapper/extract-zip	product

Impacted products

1 product

Vendor	Product	Version
max-mapper	extract-zip	Affected: 1.0.0 , ≤ 2.0.1 (semver)

Credits

Seal Security

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-19693",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-17T16:00:39.088818Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-17T16:00:48.858Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://www.npmjs.com/package/extract-zip",
          "defaultStatus": "unaffected",
          "packageName": "extract-zip",
          "platforms": [
            "Linux",
            "macOS"
          ],
          "product": "extract-zip",
          "repo": "https://github.com/max-mapper/extract-zip",
          "vendor": "max-mapper",
          "versions": [
            {
              "lessThanOrEqual": "2.0.1",
              "status": "affected",
              "version": "1.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Seal Security"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003e\u003ccode\u003eextract-zip\u003c/code\u003e through 2.0.1 containment-checks only the \u003cem\u003eparent directory\u003c/em\u003e of each archive entry and never the entry\u0027s own final path component, so an archive containing two entries with identical names - a symlink whose target is outside the destination, followed by a regular file - writes through the planted symlink and yields an arbitrary file write outside the destination directory.\u003c/p\u003e"
            }
          ],
          "value": "extract-zip through 2.0.1 containment-checks only the parent directory of each archive entry and never the entry\u0027s own final path component, so an archive containing two entries with identical names - a symlink whose target is outside the destination, followed by a regular file - writes through the planted symlink and yields an arbitrary file write outside the destination directory."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-132",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-132 Symlink Attack"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-59",
              "description": "CWE-59 Improper Link Resolution Before File Access (\u0027Link Following\u0027)",
              "lang": "en",
              "type": "CWE"
            },
            {
              "cweId": "CWE-22",
              "description": "CWE-22 Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T13:30:22.288Z",
        "orgId": "22e2d327-25fe-45d7-9f0c-dcd23b7108df",
        "shortName": "seal"
      },
      "references": [
        {
          "name": "extract-zip on npm",
          "tags": [
            "product"
          ],
          "url": "https://www.npmjs.com/package/extract-zip"
        },
        {
          "name": "max-mapper/extract-zip on GitHub",
          "tags": [
            "product"
          ],
          "url": "https://github.com/max-mapper/extract-zip"
        }
      ],
      "source": {
        "discovery": "INTERNAL"
      },
      "tags": [
        "unsupported-when-assigned"
      ],
      "title": "extract-zip arbitrary file write outside the destination directory via a symlink at the final path component",
      "x_generator": {
        "engine": "Vulnogram 1.0.2"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "22e2d327-25fe-45d7-9f0c-dcd23b7108df",
    "assignerShortName": "seal",
    "cveId": "CVE-2026-19693",
    "datePublished": "2026-08-17T13:30:22.288Z",
    "dateReserved": "2026-08-13T07:30:18.584Z",
    "dateUpdated": "2026-08-17T16:00:48.858Z",
    "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-7PQW-9J4J-H8Q3

CVE-2026-19693 (GCVE-0-2026-19693)

Tags

Sightings

Nomenclature