Authentication Timing Discrepancy in Cockpit CMS

Executive Summary

CVE-2026-82449 is an account enumeration vulnerability in Cockpit CMS versions before 2.14.1. It allows attackers to determine valid usernames by exploiting timing differences during authentication. Existing accounts trigger bcrypt password verification, causing delays, while non-existent accounts return immediately. This timing discrepancy enables attackers to guess valid accounts through repeated requests.

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Detection Guidance

To detect this vulnerability, monitor response times from the Cockpit CMS auth endpoint. Existing accounts will show delayed responses due to bcrypt verification, while non-existent accounts respond immediately. Use tools like curl or Burp Suite to send repeated login requests and measure response times for timing discrepancies.

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Impact Analysis

This vulnerability can lead to unauthorized access if attackers identify valid accounts. It enables brute force attacks by confirming usernames, which may facilitate further exploits like credential stuffing or targeted phishing. Systems using Cockpit CMS before 2.14.1 are at risk of account enumeration and potential session manipulation.

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Compliance Impact

This vulnerability may violate data protection regulations like GDPR and HIPAA by exposing user account information through timing attacks. GDPR requires protecting personal data, and HIPAA mandates safeguarding sensitive health information. A breach of account enumeration could lead to non-compliance, legal penalties, and reputational damage.

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Mitigation Strategies

Upgrade Cockpit CMS to version 2.14.1 or later to apply the patch that fixes the timing attack. If immediate upgrade is not possible, implement rate limiting on login endpoints and add dummy password checks to normalize response times during authentication attempts.

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