GHSA-HF5P-Q87M-CRJ7

Vulnerability from github – Published: 2026-04-16 21:14 – Updated: 2026-04-16 21:14
VLAI?
Summary
Junrar: Path Traversal (Zip-Slip) via Sibling Directory Name Prefix
Details

Summary

A path traversal vulnerability in LocalFolderExtractor allows an attacker to write arbitrary files with attacker-controlled content into sibling directories when a crafted RAR archive is extracted.

Example

Given an extraction directory set to /tmp/extract, a crafted archive with an entry with the filename as ../extract_evil/file.txt would be actually extracted to /tmp/extract_evil/file.txt.

Details

The createDirectory() and createFile() methods inLocalFolderExtractor validate extraction paths using a string prefix.

Severity ?
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "com.github.junrar:junrar"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.5.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-16T21:14:33Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Summary\n\nA path traversal vulnerability in `LocalFolderExtractor` allows an attacker to write arbitrary files with attacker-controlled content into sibling directories when a crafted RAR archive is extracted.\n\n### Example\n\nGiven an extraction directory set to `/tmp/extract`, a crafted archive with an entry with the filename as `../extract_evil/file.txt` would be actually extracted to `/tmp/extract_evil/file.txt`.\n\n### Details\n\nThe `createDirectory()` and `createFile()` methods in`LocalFolderExtractor` validate extraction paths using a string prefix.",
  "id": "GHSA-hf5p-q87m-crj7",
  "modified": "2026-04-16T21:14:33Z",
  "published": "2026-04-16T21:14:33Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/junrar/junrar/security/advisories/GHSA-hf5p-q87m-crj7"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/junrar/junrar"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Junrar: Path Traversal (Zip-Slip) via Sibling Directory Name Prefix"
}


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  • 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.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • 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.