EUVD-2026-10050

Comprehensive Technical Analysis of EUVD-2026-10050

1. Vulnerability Assessment and Severity Evaluation

Vulnerability Description: The vulnerability in Rocket.Chat, identified as EUVD-2026-10050 (CVE-2026-28514), is a critical authentication bypass issue affecting multiple versions of the software. The flaw arises from a missing await keyword in an asynchronous password validation function, leading to a Promise object being evaluated as truthy, thereby bypassing the actual password check.

Severity Evaluation:

• Base Score: 9.3 (CVSS 4.0)
• Vector String: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

The high base score indicates a severe vulnerability due to the following factors:

• Attack Vector (AV:N): Network-based attack, meaning it can be exploited remotely.
• Attack Complexity (AC:L): Low complexity, suggesting that the attack is relatively straightforward to execute.
• Privileges Required (PR:N): No privileges are required to exploit the vulnerability.
• User Interaction (UI:N): No user interaction is needed.
• Confidentiality (VC:H), Integrity (VI:H), and Availability (VA:H): High impact on all three CIA triad components.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: An attacker can exploit this vulnerability over the network without needing physical access to the system.
• Account Takeover: By leveraging the authentication bypass, an attacker can log in as any user whose username is known or guessable.

Exploitation Methods:

• Password Bypass: The attacker can use any arbitrary password to authenticate as a known user, effectively bypassing the password validation mechanism.
• Brute Force Usernames: If usernames are guessable or known, the attacker can systematically attempt to log in as different users.

3. Affected Systems and Software Versions

Affected Versions:

• Rocket.Chat versions prior to 7.8.6, 7.9.8, 7.10.7, 7.11.4, 7.12.4, 7.13.3, and 8.0.0.

Patched Versions:

• The vulnerability has been addressed in versions 7.8.6, 7.9.8, 7.10.7, 7.11.4, 7.12.4, 7.13.3, and 8.0.0.

4. Recommended Mitigation Strategies

Immediate Actions:

• Update Software: Upgrade to the patched versions of Rocket.Chat as soon as possible.
• Monitor Logs: Closely monitor authentication logs for any suspicious login attempts.
• Implement MFA: Enforce multi-factor authentication (MFA) to add an additional layer of security.

Long-Term Strategies:

• Regular Audits: Conduct regular security audits and code reviews to identify and fix similar issues.
• User Education: Educate users about the importance of strong, unique passwords and the risks associated with guessable usernames.
• Network Segmentation: Implement network segmentation to limit the potential impact of a successful exploit.

5. Impact on European Cybersecurity Landscape

Implications:

• Widespread Use: Rocket.Chat is widely used in various sectors, including government, healthcare, and education. A successful exploit could lead to significant data breaches and loss of sensitive information.
• Regulatory Compliance: Organizations must ensure compliance with GDPR and other relevant regulations, which could be compromised if user data is breached.
• Reputation Risk: Organizations using vulnerable versions of Rocket.Chat risk reputational damage if a breach occurs.

6. Technical Details for Security Professionals

Root Cause:

• The vulnerability is due to a missing await keyword in the asynchronous password validation function, causing a Promise object to be evaluated instead of the actual boolean result.

Code Example:

// Vulnerable code
if (passwordValidationFunction(password)) {
    // Authenticate user
}

// Corrected code
if (await passwordValidationFunction(password)) {
    // Authenticate user
}

Detection:

• Static Code Analysis: Use static code analysis tools to detect missing await keywords in asynchronous functions.
• Dynamic Analysis: Implement dynamic analysis to monitor the behavior of authentication functions during runtime.

Mitigation:

• Code Review: Ensure thorough code reviews, especially for authentication and authorization mechanisms.
• Automated Testing: Implement automated testing to catch similar issues early in the development cycle.

Conclusion: The authentication bypass vulnerability in Rocket.Chat underscores the importance of rigorous code reviews and testing, especially for critical security functions. Organizations should prioritize updating to the patched versions and implement additional security measures to mitigate the risk of similar vulnerabilities in the future.