Cloak PBKDF2 field ignores the configured iteration count and runs only :size rounds
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.
CVE-2026-94206
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-94206
cloak_ecto
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
cloak_ecto
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
cloak
Source reference: /containers/cna/affected/2/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
cloak
Source reference: /containers/cna/affected/3/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"cpes": [
"cpe:2.3:a:danielberkompas:cloak_ecto:*:*:*:*:*:*:*:*"
],
"repo": "https://github.com/danielberkompas/cloak_ecto",
"vendor": "danielberkompas",
"modules": [
"'Elixir.Cloak.Ecto.PBKDF2'"
],
"product": "cloak_ecto",
"versions": [
{
"status": "affected",
"version": "1.0.0-alpha.0",
"lessThan": "*",
"versionType": "semver"
}
],
"packageURL": "pkg:hex/cloak_ecto",
"packageName": "cloak_ecto",
"programFiles": [
"lib/cloak_ecto/types/pbkdf2.ex"
],
"collectionURL": "https://repo.hex.pm",
"defaultStatus": "unaffected"
},
{
"cpes": [
"cpe:2.3:a:danielberkompas:cloak_ecto:*:*:*:*:*:*:*:*"
],
"repo": "https://github.com/danielberkompas/cloak_ecto",
"vendor": "danielberkompas",
"modules": [
"'Elixir.Cloak.Ecto.PBKDF2'"
],
"product": "cloak_ecto",
"versions": [
{
"status": "affected",
"version": "a8fa1642b02f1c445a1ee8794c9095eb0921f8f3",
"lessThan": "*",
"versionType": "git"
}
],
"packageURL": "pkg:github/danielberkompas/cloak_ecto",
"packageName": "danielberkompas/cloak_ecto",
"programFiles": [
"lib/cloak_ecto/types/pbkdf2.ex"
],
"collectionURL": "https://github.com",
"defaultStatus": "unaffected"
},
{
"cpes": [
"cpe:2.3:a:danielberkompas:cloak:*:*:*:*:*:*:*:*"
],
"repo": "https://github.com/danielberkompas/cloak",
"vendor": "danielberkompas",
"modules": [
"'Elixir.Cloak.Fields.PBKDF2'"
],
"product": "cloak",
"versions": [
{
"status": "affected",
"version": "0.7.0",
"lessThan": "1.0.0-alpha.0",
"versionType": "semver"
}
],
"packageURL": "pkg:hex/cloak",
"packageName": "cloak",
"programFiles": [
"lib/cloak/fields/pbkdf2.ex"
],
"collectionURL": "https://repo.hex.pm",
"defaultStatus": "unaffected"
},
{
"cpes": [
"cpe:2.3:a:danielberkompas:cloak:*:*:*:*:*:*:*:*"
],
"repo": "https://github.com/danielberkompas/cloak",
"vendor": "danielberkompas",
"modules": [
"'Elixir.Cloak.Fields.PBKDF2'"
],
"product": "cloak",
"versions": [
{
"status": "affected",
"version": "8699e6417a162c39d9f0ef63511bd23d3f38d1d2",
"lessThan": "681c9702b7cd9afe0e5a840751ab009f550c69a9",
"versionType": "git"
}
],
"packageURL": "pkg:github/danielberkompas/cloak",
"packageName": "danielberkompas/cloak",
"programFiles": [
"lib/cloak/fields/pbkdf2.ex"
],
"collectionURL": "https://github.com",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-94206
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #9203 · Revision 1
- Added to Heist Feed
- Publisher date