Log in Start free

Vulnerability · Published Oct 6, 2026 · Assigned by EEF

CVE-2026-94206Cloak PBKDF2 field ignores the configured iteration count and runs only :size rounds

Medium 6.3

In plain English

A medium-severity security flaw in cloak from danielberkompas. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities).

Severity (CVSS 4.0)6.3Medium
Exploit odds (30 days)0.2%top 84.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

VendorProductVersions
danielberkompas cloak_ecto 1.0.0-alpha.0 – before *
danielberkompas cloak_ecto a8fa1642b02f1c445a1ee8794c9095eb0921f8f3 – before *
danielberkompas cloak 0.7.0 – before 1.0.0-alpha.0
danielberkompas cloak 8699e6417a162c39d9f0ef63511bd23d3f38d1d2 – before 681c9702b7cd9afe0e5a840751ab009f550c69a9

Weakness: CWE-916 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

References