Executive Summary

CVE-2026-26219 affects newbee-mall versions up to 1.0.0 and involves the use of unsalted MD5 hashing for storing and verifying user passwords.

The vulnerability arises because newbee-mall does not use per-user salts or computational cost controls in its password hashing mechanism.

This means that if attackers obtain password hashes through database breaches, backup leaks, or other compromise methods, they can rapidly recover plaintext passwords via offline attacks.

The use of MD5 without salting or key stretching makes the password hashes highly susceptible to brute-force and dictionary attacks.

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Impact Analysis

Attackers who obtain password hashes can perform rapid offline cracking to recover plaintext credentials.

Because the password hashes are unsalted, identical passwords produce identical hashes, making it easier for attackers to crack multiple accounts.

In particular, the presence of default admin credentials combined with weak hashing allows attackers to gain full administrative access and compromise the system.

This can lead to unauthorized access, data breaches, and potential further exploitation of the affected system.

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Compliance Impact

I don't know

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Detection Guidance

[{'type': 'paragraph', 'content': 'This vulnerability can be detected by inspecting the password storage mechanism used by newbee-mall. Specifically, check if user passwords are stored using unsalted MD5 hashes, which means the hashes are computed without any per-user salt or computational cost controls.'}, {'type': 'paragraph', 'content': 'To detect this on your system, you can examine the database storing user credentials for MD5 hashed passwords without salts. Additionally, reviewing the source code files such as `src/main/java/ltd/newbee/mall/util/MD5Util.java` can confirm the use of unsalted MD5 hashing.'}, {'type': 'paragraph', 'content': 'Suggested commands to detect unsalted MD5 password hashes in a database might include:'}, {'type': 'list_item', 'content': 'Query the user password hashes from the database, for example using SQL: `SELECT username, password_hash FROM users;`'}, {'type': 'list_item', 'content': 'Check if the password hashes are 32-character hexadecimal strings, typical of MD5 hashes.'}, {'type': 'list_item', 'content': 'Use a command-line tool like `grep` or `strings` on backup files or database dumps to search for MD5 hashes.'}, {'type': 'list_item', 'content': "Review the application source code for MD5 usage, e.g., `grep -r 'MD5' src/main/java/ltd/newbee/mall/`."}] [2]

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Mitigation Strategies

Immediate mitigation steps include:

• Avoid using unsalted MD5 hashing for password storage. Instead, migrate to a stronger password hashing algorithm that incorporates per-user salts and computational cost controls, such as bcrypt, Argon2, or PBKDF2.
• Change all user passwords, especially default admin credentials, to strong, unique passwords.
• Audit and secure your database and backups to prevent unauthorized access to password hashes.
• Update the newbee-mall application code to replace the MD5 hashing implementation with a secure password hashing library.
• Monitor for any signs of compromise or unauthorized access, given the high severity of this vulnerability.

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