CVE-2026-5794 Overview
CVE-2026-5794 is an account lockout vulnerability affecting Cryptobox that allows authenticated users to trigger denial of service conditions against other legitimate users. By sending specially crafted requests, an attacker with valid credentials can force account lockouts for other users, effectively preventing them from accessing the system.
Critical Impact
Authenticated attackers can deny legitimate users access to the Cryptobox platform by triggering account lockouts, disrupting business operations and potentially enabling further attacks during the lockout window.
Affected Products
- Cryptobox (specific affected versions not disclosed in advisory)
Discovery Timeline
- 2026-04-28 - CVE-2026-5794 published to NVD
- 2026-04-28 - Last updated in NVD database
Technical Details for CVE-2026-5794
Vulnerability Analysis
This vulnerability falls under CWE-694 (Use of Multiple Resources with Duplicate Identifier), indicating a flaw in how the Cryptobox application handles user authentication states and account lockout mechanisms. The design weakness allows one authenticated user to influence the authentication state of another user's account.
The attack leverages the account lockout mechanism that is typically designed as a security feature to protect against brute force attacks. However, the implementation fails to properly validate the source and context of authentication failures, allowing a legitimate user to manipulate the lockout counter for arbitrary accounts.
Root Cause
The root cause stems from improper authentication state management within Cryptobox. The account lockout mechanism does not adequately isolate authentication attempts between different user sessions, allowing cross-user manipulation. This represents a fundamental design flaw in how the application tracks failed authentication attempts and applies account lockout policies.
Attack Vector
The vulnerability is exploitable over the network with low attack complexity. An attacker requires low-level privileges (a valid user account) but no user interaction from the victim. The attack can be executed remotely by sending specially crafted requests that trigger the account lockout mechanism for targeted user accounts.
The attacker would need to know or enumerate valid usernames within the Cryptobox system to target specific accounts. Once the target account is locked, the legitimate user cannot access their account until the lockout period expires or an administrator intervenes.
Detection Methods for CVE-2026-5794
Indicators of Compromise
- Unusual patterns of account lockouts affecting multiple users in a short timeframe
- Authentication-related requests originating from a single authenticated session targeting multiple user accounts
- Elevated rates of failed authentication events correlated with specific source accounts or IP addresses
Detection Strategies
- Monitor authentication logs for anomalous patterns where a single user session generates lockout events for multiple accounts
- Implement correlation rules to detect when authenticated users are sending requests that reference other user identifiers
- Alert on sudden spikes in account lockout events, especially when they deviate from baseline patterns
- Track API calls or HTTP requests that include user identifiers different from the authenticated session
Monitoring Recommendations
- Enable detailed logging for all authentication-related events including lockout triggers
- Implement real-time alerting for bulk account lockout events
- Review access logs to correlate authenticated sessions with account lockout events affecting other users
- Consider deploying behavioral analytics to identify insider threat patterns
How to Mitigate CVE-2026-5794
Immediate Actions Required
- Review and audit current account lockout policies and thresholds
- Implement rate limiting on authentication-related endpoints per source IP and authenticated session
- Monitor for suspicious lockout patterns and investigate any anomalies
- Consider temporarily increasing administrator monitoring of account lockout events
Patch Information
Consult the official Cryptobox Documentation v4.40 for the latest security updates and patch availability. Organizations should prioritize applying vendor-supplied patches as soon as they become available.
Workarounds
- Implement additional validation to ensure authentication failure tracking is properly scoped to individual sessions
- Configure network-level controls to limit the rate of authentication-related requests
- Implement CAPTCHA or progressive delays for repeated authentication attempts from the same session
- Consider temporary account lockout notification systems to alert administrators and affected users promptly
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
