GitHacker: Path traversal in ref/hash parsing enables existence oracle and hex-fragment exfiltration via a malicious .git server

{
  "id": "3cb7595f2173bfa523d97a7f1d26e4375cca516a52d579858048bfa6227bec48",
  "url": "https://osv.dev/vulnerability/CVE-2026-50024",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "GitHacker: Path traversal in ref/hash parsing enables existence oracle and hex-fragment exfiltration via a malicious .git server",
    "summary": "GitHacker is a tool that restores Git repositories from exposed .git directories. In 1.1.7 and earlier, add_head_file_tasks parses an attacker-controlled ref path from .git/HEAD and joins unvalidated path segments onto temp_dst/.git/logs/, allowing a malicious server to make GitHacker read an arbitrary local file when a victim runs the tool against the server's URL. add_hashes_parsed then scans the file for 40-character hexadecimal substrings and requests each match through .git/objects using the first two characters and remaining characters as path components, creating an attacker-observable existence oracle and disclosing matching hexadecimal fragments. Complete file contents are not returned, and the add_folder and add_task write path in shipped version 1.1.7 does not permit an escape. This issue is fixed in repository version 1.1.9.",
    "evidence": "osv:CVE-2026-50024",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-50024",
      "aliases": [
        "CVE-2026-50024",
        "GHSA-hr3m-4qwq-3mgc",
        "PYSEC-2026-3835"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/wangyihang/githacker",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "16fcd81a9c3dfdf39713fde360d4e8bc3acf99e7"
                },
                {
                  "fixed": "5f2a8ba4d451c6a1a465893507fbc42535a9d8c8"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "fixed": "16fcd81a9c3dfdf39713fde360d4e8bc3acf99e7"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "5f2a8ba4d451c6a1a465893507fbc42535a9d8c8"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.1.3",
            "v1.1.0",
            "v1.0.11",
            "v1.0.9",
            "v1.0.2",
            "v1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-50024.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:36.093418469Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50024.json",
        "https://github.com/WangYihang/GitHacker/security/advisories/GHSA-hr3m-4qwq-3mgc",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-50024",
        "https://github.com/WangYihang/GitHacker/commit/16fcd81a9c3dfdf39713fde360d4e8bc3acf99e7",
        "https://github.com/WangYihang/GitHacker/commit/5f2a8ba4d451c6a1a465893507fbc42535a9d8c8",
        "https://github.com/WangYihang/GitHacker/pull/65"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-22",
          "CWE-23"
        ],
        "cna_assigner": "GitHub_M",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "1.1.8"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              }
            ]
          },
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "last_affected": "1.1.7"
                  }
                ],
                "source": "DESCRIPTION"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50024.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-50024",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 503368,
  "published_at": "2026-09-15T15:01:55.365+00:00"
}