{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-94206", "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "state": "PUBLISHED", "assignerShortName": "EEF", "dateReserved": "2026-09-24T09:30:02.102Z", "datePublished": "2026-10-06T08:38:04.584Z", "dateUpdated": "2026-10-06T08:38:04.584Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://repo.hex.pm", "cpes": ["cpe:2.3:a:danielberkompas:cloak_ecto:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["'Elixir.Cloak.Ecto.PBKDF2'"], "packageName": "cloak_ecto", "packageURL": "pkg:hex/cloak_ecto", "product": "cloak_ecto", "programFiles": ["lib/cloak_ecto/types/pbkdf2.ex"], "repo": "https://github.com/danielberkompas/cloak_ecto", "vendor": "danielberkompas", "versions": [{"lessThan": "*", "status": "affected", "version": "1.0.0-alpha.0", "versionType": "semver"}]}, {"collectionURL": "https://github.com", "cpes": ["cpe:2.3:a:danielberkompas:cloak_ecto:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["'Elixir.Cloak.Ecto.PBKDF2'"], "packageName": "danielberkompas/cloak_ecto", "packageURL": "pkg:github/danielberkompas/cloak_ecto", "product": "cloak_ecto", "programFiles": ["lib/cloak_ecto/types/pbkdf2.ex"], "repo": "https://github.com/danielberkompas/cloak_ecto", "vendor": "danielberkompas", "versions": [{"lessThan": "*", "status": "affected", "version": "a8fa1642b02f1c445a1ee8794c9095eb0921f8f3", "versionType": "git"}]}, {"collectionURL": "https://repo.hex.pm", "cpes": ["cpe:2.3:a:danielberkompas:cloak:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["'Elixir.Cloak.Fields.PBKDF2'"], "packageName": "cloak", "packageURL": "pkg:hex/cloak", "product": "cloak", "programFiles": ["lib/cloak/fields/pbkdf2.ex"], "repo": "https://github.com/danielberkompas/cloak", "vendor": "danielberkompas", "versions": [{"lessThan": "1.0.0-alpha.0", "status": "affected", "version": "0.7.0", "versionType": "semver"}]}, {"collectionURL": "https://github.com", "cpes": ["cpe:2.3:a:danielberkompas:cloak:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["'Elixir.Cloak.Fields.PBKDF2'"], "packageName": "danielberkompas/cloak", "packageURL": "pkg:github/danielberkompas/cloak", "product": "cloak", "programFiles": ["lib/cloak/fields/pbkdf2.ex"], "repo": "https://github.com/danielberkompas/cloak", "vendor": "danielberkompas", "versions": [{"lessThan": "681c9702b7cd9afe0e5a840751ab009f550c69a9", "status": "affected", "version": "8699e6417a162c39d9f0ef63511bd23d3f38d1d2", "versionType": "git"}]}], "cpeApplicability": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:danielberkompas:cloak_ecto:*:*:*:*:*:*:*:*", "versionStartIncluding": "1.0.0-alpha.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:danielberkompas:cloak:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.0.0-alpha.0", "versionStartIncluding": "0.7.0", "vulnerable": true}], "negate": false, "operator": "OR"}], "operator": "AND"}], "credits": [{"lang": "en", "type": "finder", "value": "Peter Ullrich"}, {"lang": "en", "type": "reporter", "value": "Peter Ullrich"}, {"lang": "en", "type": "coordinator", "value": "Jonatan M\u00e4nnchen / EEF"}], "dateAssigned": "2026-10-06T08:35:00.000Z", "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>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.</p>\n<p>The <code>dump/1</code> callback that <code>Cloak.Ecto.PBKDF2</code> (<code>Cloak.Fields.PBKDF2</code> in cloak before the Ecto code moved to cloak_ecto) injects into a field module calls <code>:pbkdf2.pbkdf2/4</code> with <code>config[:size]</code> in the iteration-count position. The <code>:iterations</code> setting is validated but never used. With the cloak_ecto defaults (<code>iterations: 600_000</code>, <code>size: 32</code>) 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.</p>\n<p>This issue affects cloak_ecto: from 1.0.0-alpha.0 onward; cloak: from 0.7.0 before 1.0.0-alpha.0.</p>"}, {"base64": false, "type": "text/markdown", "value": "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.\n\nThe `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.\n\nThis issue affects cloak_ecto: from 1.0.0-alpha.0 onward; cloak: from 0.7.0 before 1.0.0-alpha.0."}], "value": "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.\n\nThe 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.\n\nThis issue affects cloak_ecto: from 1.0.0-alpha.0 onward; cloak: from 0.7.0 before 1.0.0-alpha.0."}], "impacts": [{"capecId": "CAPEC-55", "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>An attacker who obtains a database dump and the PBKDF2 secret can recover hashed values with low entropy, such as email addresses, by offline guessing at a cost far below what the configuration promises.</p>"}, {"base64": false, "type": "text/markdown", "value": "An attacker who obtains a database dump and the PBKDF2 secret can recover hashed values with low entropy, such as email addresses, by offline guessing at a cost far below what the configuration promises."}], "value": "An attacker who obtains a database dump and the PBKDF2 secret can recover hashed values with low entropy, such as email addresses, by offline guessing at a cost far below what the configuration promises."}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "baseScore": 6.3, "baseSeverity": "MEDIUM", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "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", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-916", "description": "CWE-916 Use of Password Hash With Insufficient Computational Effort", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "shortName": "EEF", "dateUpdated": "2026-10-06T08:38:04.584Z"}, "references": [{"name": "EEF CNA record for CVE-2026-94206", "tags": ["related", "third-party-advisory"], "url": "https://cna.erlef.org/cves/CVE-2026-94206.html"}, {"name": "OSV record EEF-CVE-2026-94206", "tags": ["related"], "url": "https://osv.dev/vulnerability/EEF-CVE-2026-94206"}, {"name": "Introducing commit a8fa164 in danielberkompas/cloak_ecto", "tags": ["related"], "url": "https://github.com/danielberkompas/cloak_ecto/commit/a8fa1642b02f1c445a1ee8794c9095eb0921f8f3"}, {"name": "Introducing commit 8699e64 in danielberkompas/cloak", "tags": ["related"], "url": "https://github.com/danielberkompas/cloak/commit/8699e6417a162c39d9f0ef63511bd23d3f38d1d2"}, {"name": "Fix commit 681c970 in danielberkompas/cloak", "tags": ["patch"], "url": "https://github.com/danielberkompas/cloak/commit/681c9702b7cd9afe0e5a840751ab009f550c69a9"}], "source": {"discovery": "EXTERNAL"}, "title": "Cloak PBKDF2 field ignores the configured iteration count and runs only :size rounds", "workarounds": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Override <code>dump/1</code> in the field module that uses <code>Cloak.Ecto.PBKDF2</code>, so that it calls <code>:pbkdf2.pbkdf2/5</code> with the configured <code>:iterations</code> and <code>:size</code>. Then recompute all stored hashes, because the existing values no longer match.</p>"}, {"base64": false, "type": "text/markdown", "value": "Override `dump/1` in the field module that uses `Cloak.Ecto.PBKDF2`, so that it calls `:pbkdf2.pbkdf2/5` with the configured `:iterations` and `:size`. Then recompute all stored hashes, because the existing values no longer match."}], "value": "Override dump/1 in the field module that uses Cloak.Ecto.PBKDF2, so that it calls :pbkdf2.pbkdf2/5 with the configured :iterations and :size. Then recompute all stored hashes, because the existing values no longer match."}], "x_proofOfConcept": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<ol>\n<li>Define a field module with <code>use Cloak.Ecto.PBKDF2</code> and configure only a <code>:secret</code>, so that the defaults <code>iterations: 600_000</code> and <code>size: 32</code> apply.</li>\n<li>Call <code>dump/1</code> on a value.</li>\n<li>Compare the result with <code>:pbkdf2.pbkdf2({:hmac, :sha256}, value, secret, 32)</code> and with the same call at 600,000 rounds. It matches the 32-round hash, not the 600,000-round hash, and returns in microseconds instead of about one second.</li>\n</ol>"}, {"base64": false, "type": "text/markdown", "value": "1. Define a field module with `use Cloak.Ecto.PBKDF2` and configure only a `:secret`, so that the defaults `iterations: 600_000` and `size: 32` apply.\n2. Call `dump/1` on a value.\n3. Compare the result with `:pbkdf2.pbkdf2({:hmac, :sha256}, value, secret, 32)` and with the same call at 600,000 rounds. It matches the 32-round hash, not the 600,000-round hash, and returns in microseconds instead of about one second."}], "value": "* Define a field module with use Cloak.Ecto.PBKDF2 and configure only a :secret, so that the defaults iterations: 600_000 and size: 32 apply.\n* Call dump/1 on a value.\n* Compare the result with :pbkdf2.pbkdf2({:hmac, :sha256}, value, secret, 32) and with the same call at 600,000 rounds. It matches the 32-round hash, not the 600,000-round hash, and returns in microseconds instead of about one second."}]}}}

{}

{"affected": [{"affectedData": [{"collectionURL": "https://repo.hex.pm", "cpes": ["cpe:2.3:a:danielberkompas:cloak_ecto:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["'Elixir.Cloak.Ecto.PBKDF2'"], "packageName": "cloak_ecto", "packageURL": "pkg:hex/cloak_ecto", "product": "cloak_ecto", "programFiles": ["lib/cloak_ecto/types/pbkdf2.ex"], "repo": "https://github.com/danielberkompas/cloak_ecto", "vendor": "danielberkompas", "versions": [{"lessThan": "*", "status": "affected", "version": "1.0.0-alpha.0", "versionType": "semver"}]}, {"collectionURL": "https://github.com", "cpes": ["cpe:2.3:a:danielberkompas:cloak_ecto:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["'Elixir.Cloak.Ecto.PBKDF2'"], "packageName": "danielberkompas/cloak_ecto", "packageURL": "pkg:github/danielberkompas/cloak_ecto", "product": "cloak_ecto", "programFiles": ["lib/cloak_ecto/types/pbkdf2.ex"], "repo": "https://github.com/danielberkompas/cloak_ecto", "vendor": "danielberkompas", "versions": [{"lessThan": "*", "status": "affected", "version": "a8fa1642b02f1c445a1ee8794c9095eb0921f8f3", "versionType": "git"}]}, {"collectionURL": "https://repo.hex.pm", "cpes": ["cpe:2.3:a:danielberkompas:cloak:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["'Elixir.Cloak.Fields.PBKDF2'"], "packageName": "cloak", "packageURL": "pkg:hex/cloak", "product": "cloak", "programFiles": ["lib/cloak/fields/pbkdf2.ex"], "repo": "https://github.com/danielberkompas/cloak", "vendor": "danielberkompas", "versions": [{"lessThan": "1.0.0-alpha.0", "status": "affected", "version": "0.7.0", "versionType": "semver"}]}, {"collectionURL": "https://github.com", "cpes": ["cpe:2.3:a:danielberkompas:cloak:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["'Elixir.Cloak.Fields.PBKDF2'"], "packageName": "danielberkompas/cloak", "packageURL": "pkg:github/danielberkompas/cloak", "product": "cloak", "programFiles": ["lib/cloak/fields/pbkdf2.ex"], "repo": "https://github.com/danielberkompas/cloak", "vendor": "danielberkompas", "versions": [{"lessThan": "681c9702b7cd9afe0e5a840751ab009f550c69a9", "status": "affected", "version": "8699e6417a162c39d9f0ef63511bd23d3f38d1d2", "versionType": "git"}]}], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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.\n\nThe 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.\n\nThis issue affects cloak_ecto: from 1.0.0-alpha.0 onward; cloak: from 0.7.0 before 1.0.0-alpha.0."}], "id": "CVE-2026-94206", "lastModified": "2026-10-06T09:17:56.813", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.3, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}]}, "published": "2026-10-06T09:17:56.813", "references": [{"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://cna.erlef.org/cves/CVE-2026-94206.html"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/danielberkompas/cloak/commit/681c9702b7cd9afe0e5a840751ab009f550c69a9"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/danielberkompas/cloak/commit/8699e6417a162c39d9f0ef63511bd23d3f38d1d2"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/danielberkompas/cloak_ecto/commit/a8fa1642b02f1c445a1ee8794c9095eb0921f8f3"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://osv.dev/vulnerability/EEF-CVE-2026-94206"}], "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-916"}], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}]}

{}

{}