GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

GHSA-VJ76-C3G6-QR5V

Vulnerability from github – Published: 2025-09-24 18:57 – Updated: 2025-11-03 21:34
VLAI
Summary
tar-fs has a symlink validation bypass if destination directory is predictable with a specific tarball
Details

Impact

v3.1.0, v2.1.3, v1.16.5 and below

Patches

Has been patched in 3.1.1, 2.1.4, and 1.16.6

Workarounds

You can use the ignore option to ignore non files/directories.

  ignore (_, header) {
    // pass files & directories, ignore e.g. symlinks
    return header.type !== 'file' && header.type !== 'directory'
  }

Credit

Reported by: Mapta / BugBunny_ai

Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Show details on source website
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "tar-fs"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.0.0"
            },
            {
              "fixed": "3.1.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "tar-fs"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.0.0"
            },
            {
              "fixed": "2.1.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "tar-fs"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.16.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-59343"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22",
      "CWE-61"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-09-24T18:57:04Z",
    "nvd_published_at": "2025-09-24T18:15:42Z",
    "severity": "HIGH"
  },
  "details": "### Impact\n v3.1.0, v2.1.3, v1.16.5 and below\n\n### Patches\nHas been patched in 3.1.1, 2.1.4, and 1.16.6\n\n### Workarounds\nYou can use the ignore option to ignore non files/directories.\n\n```js\n  ignore (_, header) {\n    // pass files \u0026 directories, ignore e.g. symlinks\n    return header.type !== \u0027file\u0027 \u0026\u0026 header.type !== \u0027directory\u0027\n  }\n```\n\n### Credit\nReported by: Mapta / BugBunny_ai",
  "id": "GHSA-vj76-c3g6-qr5v",
  "modified": "2025-11-03T21:34:35Z",
  "published": "2025-09-24T18:57:04Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/mafintosh/tar-fs/security/advisories/GHSA-vj76-c3g6-qr5v"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-59343"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mafintosh/tar-fs/commit/0bd54cdf06da2b7b5b95cd4b062c9f4e0a8c4e09"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/mafintosh/tar-fs"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/09/msg00028.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "tar-fs has a symlink validation bypass if destination directory is predictable with a specific tarball"
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.