Riskcovery

CVE-2026-81853

AshAdmin composite primary key decoding accepts arbitrary fields, enabling a secret-attribute oracle

State
Published
Severity
2.3 Low
Published
Aug 31, 2026
Updated
Aug 31, 2026
Reserved
Aug 30, 2026

Read the record on cve.org

Description

Authorization Bypass Through User-Controlled Key vulnerability in ash-project ash_admin turns a record-lookup URL into an equality oracle over sensitive attributes.

AshAdmin.Helpers.decode_primary_key/2 decodes the composite-primary-key form (Base64 plus ETF) and returns the decoded map verbatim as the lookup filter, without checking that its keys are the resource's primary-key fields. The deserialization guards bound size, block new atoms and funs, and reject nested expressions, but none restricts which fields come back, and :safe still allows any already-interned attribute name. An attacker can therefore encode %{api_token: "guess"} and have it spliced into the lookup filter, brute-forcing a sensitive attribute value (API token, reset token) one equality guess at a time; Map.to_list/1 also accepts structs, yielding a bogus __struct__ key. The fix rejects any decoded key that is not a real primary-key field.

This issue affects ash_admin: from 0.1.0 before 1.3.1.

Scores

CVSSScoreVectorSource
4.02.3 LowCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:NEEF

Weaknesses

  • CWE-639 Authorization Bypass Through User-Controlled Key

Affected Products

ProductVersions
ash_adminash-project
  • 0.1.0 to before 1.3.1Affected
ash_adminash-project
  • 98b03baa8422b94dd13e305bf08b8ee3f7232c7b to before 3c3e905d47f1155dcc1ca3fb347348b05a66065aAffected

References

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