PYSEC-2026-788

Vulnerability from pysec - Published: 2026-07-07 10:17 - Updated: 2026-07-07 11:30
VLAI
Details

A vulnerability, which was classified as problematic, was found in ReFirm Labs binwalk up to 2.3.2. Affected is an unknown function of the file src/binwalk/modules/extractor.py of the component Archive Extraction Handler. The manipulation leads to symlink following. It is possible to launch the attack remotely. Upgrading to version 2.3.3 can address this issue. The name of the patch is fa0c0bd59b8588814756942fe4cb5452e76c1dcd. It is recommended to upgrade the affected component. The identifier of this vulnerability is VDB-216876.

Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Impacted products
Name purl
binwalk pkg:pypi/binwalk
Aliases
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "binwalk",
        "purl": "pkg:pypi/binwalk"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.3.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.1.0"
      ]
    }
  ],
  "aliases": [
    "CVE-2021-4287",
    "GHSA-8m3f-g62j-3vx8"
  ],
  "details": "A vulnerability, which was classified as problematic, was found in ReFirm Labs binwalk up to 2.3.2. Affected is an unknown function of the file src/binwalk/modules/extractor.py of the component Archive Extraction Handler. The manipulation leads to symlink following. It is possible to launch the attack remotely. Upgrading to version 2.3.3 can address this issue. The name of the patch is fa0c0bd59b8588814756942fe4cb5452e76c1dcd. It is recommended to upgrade the affected component. The identifier of this vulnerability is VDB-216876.",
  "id": "PYSEC-2026-788",
  "modified": "2026-07-07T11:30:27.932151Z",
  "published": "2026-07-07T10:17:25.876034Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-4287"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ReFirmLabs/binwalk/pull/556"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ReFirmLabs/binwalk/commit/fa0c0bd59b8588814756942fe4cb5452e76c1dcd"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ReFirmLabs/binwalk"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ReFirmLabs/binwalk/releases/tag/v2.3.3"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?ctiid.216876"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?id.216876"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/binwalk"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-8m3f-g62j-3vx8"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "binwalk vulnerable to UNIX Symbolic Link (Symlink) Following"
}



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