FKIE_CVE-2026-45380

Vulnerability from fkie_nvd - Published: 2026-06-10 22:16 - Updated: 2026-07-23 09:10
Severity
3.6 (Low) - CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L
Summary
bit7z is a cross-platform C++ static library that allows the compression/extraction of archive files. Prior to version 4.0.12, a one-byte off-by-one error in SafeOutPathBuilder::restoreSymlink() allows an attacker to craft a .7z archive that, when extracted with bit7z on any non-Windows platform, creates a symlink escaping the intended output directory. Subsequent archive entries extracted through this symlink write arbitrary files outside the extraction directory with the permissions of the extracting process. This issue has been patched in version 4.0.12.
References
security-advisories@github.comhttps://github.com/rikyoz/bit7z/releases/tag/v4.0.12
security-advisories@github.comhttps://github.com/rikyoz/bit7z/security/advisories/GHSA-8wj8-9jwv-j24v
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/rikyoz/bit7z/security/advisories/GHSA-8wj8-9jwv-j24v
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "bit7z",
          "vendor": "rikyoz",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 4.0.12"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "bit7z is a cross-platform C++ static library that allows the compression/extraction of archive files. Prior to version 4.0.12, a one-byte off-by-one error in SafeOutPathBuilder::restoreSymlink() allows an attacker to craft a .7z archive that, when extracted with bit7z on any non-Windows platform, creates a symlink escaping the intended output directory. Subsequent archive entries extracted through this symlink write arbitrary files outside the extraction directory with the permissions of the extracting process. This issue has been patched in version 4.0.12."
    },
    {
      "lang": "es",
      "value": "bit7z es una biblioteca est\u00e1tica de C++ multiplataforma que permite la compresi\u00f3n/extracci\u00f3n de archivos de archivo. Antes de la versi\u00f3n 4.0.12, un error de un byte por uno en SafeOutPathBuilder::restoreSymlink() permite a un atacante crear un archivo .7z que, al ser extra\u00eddo con bit7z en cualquier plataforma que no sea Windows, crea un enlace simb\u00f3lico que escapa del directorio de salida previsto. Las entradas de archivo subsiguientes extra\u00eddas a trav\u00e9s de este enlace simb\u00f3lico escriben archivos arbitrarios fuera del directorio de extracci\u00f3n con los permisos del proceso de extracci\u00f3n. Este problema ha sido parcheado en la versi\u00f3n 4.0.12."
    }
  ],
  "id": "CVE-2026-45380",
  "lastModified": "2026-07-23T09:10:00.113",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "LOW",
          "baseScore": 3.6,
          "baseSeverity": "LOW",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 1.0,
        "impactScore": 2.5,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-45380",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-11T14:12:55.595820Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-10T22:16:58.207",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/rikyoz/bit7z/releases/tag/v4.0.12"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/rikyoz/bit7z/security/advisories/GHSA-8wj8-9jwv-j24v"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/rikyoz/bit7z/security/advisories/GHSA-8wj8-9jwv-j24v"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        },
        {
          "lang": "en",
          "value": "CWE-193"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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