CVE-2026-94206
MediumCVSS 6.3Exploitation Probability (EPSS)
Low risk16th percentile - higher than 16% of all known CVEs
Summary
The vulnerability in cloak_ecto and cloak libraries involves using a password hash with insufficient computational effort. An attacker who holds hashed values and the configured secret can brute-force low-entropy plaintexts much faster than configured.
Risk Assessment
The organization is exposed to faster guessing of low-entropy passwords, potentially leading to unauthorized access to data protected by those passwords.
Recommendation
Update cloak_ecto and cloak to versions where the iteration parameter in PBKDF2 is correctly used, and consider increasing the iteration count in configuration.
Related vulnerabilities
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Original NVD description (English source)
Use of Password Hash With Insufficient Computational Effort vulnerability in danielberkompas cloak_ecto and danielberkompas cloak allows an attacker who holds the hashed values and the configured secret to brute-force low-entropy plaintexts much faster than configured. The dump/1 callback that Cloak.Ecto.PBKDF2 (Cloak.Fields.PBKDF2 in cloak before the Ecto code moved to cloak_ecto) injects into a field module calls :pbkdf2.pbkdf2/4 with config[:size] in the iteration-count position. The :iterations setting is validated but never used. With the cloak_ecto defaults (iterations: 600_000, size: 32) each hash runs 32 PBKDF2 rounds instead of 600,000, so offline guessing of values such as email addresses costs about 18,750 times less than configured. This issue affects cloak_ecto: from 1.0.0-alpha.0 onward; cloak: from 0.7.0 before 1.0.0-alpha.0.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

