{"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": "2026-10-06T11:36:25.466Z"}, "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": "

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

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.

\n

This issue affects cloak_ecto: from 1.0.0-alpha.0 onward; cloak: from 0.7.0 before 1.0.0-alpha.0.

"}, {"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": "

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.

"}, {"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": "

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.

"}, {"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": "
    \n
  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.
    2. \n
  2. Call dump/1 on a value.
    3. \n
  3. 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.
    4. \n
"}, {"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."}], "x_gcve": [{"vulnId": "CVE-2026-94206", "recordType": "advisory"}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-10-06T11:34:00.942993Z", "id": "CVE-2026-94206", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-06T11:36:25.466Z"}}]}, "vulnerability-lookup:meta": {"epss": {"cve": "CVE-2026-94206", "date": "2026-11-13", "epss": "0.00245", "percentile": "0.15849"}, "nvd": "{\"cve\":{\"id\":\"CVE-2026-94206\",\"sourceIdentifier\":\"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\",\"published\":\"2026-10-06T09:17:56.813\",\"lastModified\":\"2026-10-06T15:03:59.427\",\"vulnStatus\":\"Deferred\",\"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.\"}],\"affected\":[{\"source\":\"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\",\"affectedData\":[{\"vendor\":\"danielberkompas\",\"product\":\"cloak_ecto\",\"defaultStatus\":\"unaffected\",\"collectionURL\":\"https://repo.hex.pm\",\"packageName\":\"cloak_ecto\",\"cpes\":[\"cpe:2.3:a:danielberkompas:cloak_ecto:*:*:*:*:*:*:*:*\"],\"modules\":[\"'Elixir.Cloak.Ecto.PBKDF2'\"],\"programFiles\":[\"lib/cloak_ecto/types/pbkdf2.ex\"],\"repo\":\"https://github.com/danielberkompas/cloak_ecto\",\"packageURL\":\"pkg:hex/cloak_ecto\",\"versions\":[{\"version\":\"1.0.0-alpha.0\",\"lessThan\":\"*\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"danielberkompas\",\"product\":\"cloak_ecto\",\"defaultStatus\":\"unaffected\",\"collectionURL\":\"https://github.com\",\"packageName\":\"danielberkompas/cloak_ecto\",\"cpes\":[\"cpe:2.3:a:danielberkompas:cloak_ecto:*:*:*:*:*:*:*:*\"],\"modules\":[\"'Elixir.Cloak.Ecto.PBKDF2'\"],\"programFiles\":[\"lib/cloak_ecto/types/pbkdf2.ex\"],\"repo\":\"https://github.com/danielberkompas/cloak_ecto\",\"packageURL\":\"pkg:github/danielberkompas/cloak_ecto\",\"versions\":[{\"version\":\"a8fa1642b02f1c445a1ee8794c9095eb0921f8f3\",\"lessThan\":\"*\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"danielberkompas\",\"product\":\"cloak\",\"defaultStatus\":\"unaffected\",\"collectionURL\":\"https://repo.hex.pm\",\"packageName\":\"cloak\",\"cpes\":[\"cpe:2.3:a:danielberkompas:cloak:*:*:*:*:*:*:*:*\"],\"modules\":[\"'Elixir.Cloak.Fields.PBKDF2'\"],\"programFiles\":[\"lib/cloak/fields/pbkdf2.ex\"],\"repo\":\"https://github.com/danielberkompas/cloak\",\"packageURL\":\"pkg:hex/cloak\",\"versions\":[{\"version\":\"0.7.0\",\"lessThan\":\"1.0.0-alpha.0\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"danielberkompas\",\"product\":\"cloak\",\"defaultStatus\":\"unaffected\",\"collectionURL\":\"https://github.com\",\"packageName\":\"danielberkompas/cloak\",\"cpes\":[\"cpe:2.3:a:danielberkompas:cloak:*:*:*:*:*:*:*:*\"],\"modules\":[\"'Elixir.Cloak.Fields.PBKDF2'\"],\"programFiles\":[\"lib/cloak/fields/pbkdf2.ex\"],\"repo\":\"https://github.com/danielberkompas/cloak\",\"packageURL\":\"pkg:github/danielberkompas/cloak\",\"versions\":[{\"version\":\"8699e6417a162c39d9f0ef63511bd23d3f38d1d2\",\"lessThan\":\"681c9702b7cd9afe0e5a840751ab009f550c69a9\",\"versionType\":\"git\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"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\",\"baseScore\":6.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"PRESENT\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"LOW\",\"vulnIntegrityImpact\":\"NONE\",\"vulnAvailabilityImpact\":\"NONE\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-10-06T11:34:00.942993Z\",\"id\":\"CVE-2026-94206\",\"options\":[{\"exploitation\":\"poc\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-916\"}]}],\"references\":[{\"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\",\"source\":\"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\"}]}}", "vulnrichment": {"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-94206\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-10-06T11:34:00.942993Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-10-06T11:34:55.954Z\"}}], \"cna\": {\"title\": \"Cloak PBKDF2 field ignores the configured iteration count and runs only :size rounds\", \"source\": {\"discovery\": \"EXTERNAL\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Peter Ullrich\"}, {\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"Peter Ullrich\"}, {\"lang\": \"en\", \"type\": \"coordinator\", \"value\": \"Jonatan M\\u00e4nnchen / EEF\"}], \"impacts\": [{\"capecId\": \"CAPEC-55\", \"descriptions\": [{\"lang\": \"en\", \"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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"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.

\", \"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.\", \"base64\": false}]}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"Safety\": \"NOT_DEFINED\", \"version\": \"4.0\", \"Recovery\": \"NOT_DEFINED\", \"baseScore\": 6.3, \"Automatable\": \"NOT_DEFINED\", \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"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\", \"providerUrgency\": \"NOT_DEFINED\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"PRESENT\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"NONE\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"LOW\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"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\"}], \"references\": [{\"url\": \"https://cna.erlef.org/cves/CVE-2026-94206.html\", \"name\": \"EEF CNA record for CVE-2026-94206\", \"tags\": [\"related\", \"third-party-advisory\"]}, {\"url\": \"https://osv.dev/vulnerability/EEF-CVE-2026-94206\", \"name\": \"OSV record EEF-CVE-2026-94206\", \"tags\": [\"related\"]}, {\"url\": \"https://github.com/danielberkompas/cloak_ecto/commit/a8fa1642b02f1c445a1ee8794c9095eb0921f8f3\", \"name\": \"Introducing commit a8fa164 in danielberkompas/cloak_ecto\", \"tags\": [\"related\"]}, {\"url\": \"https://github.com/danielberkompas/cloak/commit/8699e6417a162c39d9f0ef63511bd23d3f38d1d2\", \"name\": \"Introducing commit 8699e64 in danielberkompas/cloak\", \"tags\": [\"related\"]}, {\"url\": \"https://github.com/danielberkompas/cloak/commit/681c9702b7cd9afe0e5a840751ab009f550c69a9\", \"name\": \"Fix commit 681c970 in danielberkompas/cloak\", \"tags\": [\"patch\"]}], \"workarounds\": [{\"lang\": \"en\", \"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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"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.

\", \"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.\", \"base64\": false}]}], \"dateAssigned\": \"2026-10-06T08:35:00.000Z\", \"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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"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

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.

\\n

This issue affects cloak_ecto: from 1.0.0-alpha.0 onward; cloak: from 0.7.0 before 1.0.0-alpha.0.

\", \"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.\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-916\", \"description\": \"CWE-916 Use of Password Hash With Insufficient Computational Effort\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:danielberkompas:cloak_ecto:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"1.0.0-alpha.0\"}, {\"criteria\": \"cpe:2.3:a:danielberkompas:cloak:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"1.0.0-alpha.0\", \"versionStartIncluding\": \"0.7.0\"}], \"operator\": \"OR\"}], \"operator\": \"AND\"}], \"providerMetadata\": {\"orgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"shortName\": \"EEF\", \"dateUpdated\": \"2026-10-06T08:38:04.584Z\"}, \"x_proofOfConcept\": [{\"lang\": \"en\", \"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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"
    \\n
  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.
    2. \\n
  2. Call dump/1 on a value.
    3. \\n
  3. 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.
    4. \\n
\", \"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.\", \"base64\": false}]}]}}", "cveMetadata": "{\"cveId\": \"CVE-2026-94206\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-10-06T11:36:25.466Z\", \"dateReserved\": \"2026-09-24T09:30:02.102Z\", \"assignerOrgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"datePublished\": \"2026-10-06T08:38:04.584Z\", \"assignerShortName\": \"EEF\"}", "dataType": "CVE_RECORD", "dataVersion": "5.2"}}}