CVE-2026-81853
- Source
- https://cve.org/CVERecord?id=CVE-2026-81853
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-81853.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-81853
- Aliases
-
- EEF-CVE-2026-81853
- GHSA-jxr8-hpv2-qp38
- Published
- 2026-08-31T02:31:29Z
- Modified
- 2026-09-03T03:30:23Z
- Severity
-
- 2.3 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- AshAdmin composite primary key decoding accepts arbitrary fields, enabling a secret-attribute oracle
- Details
-
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.
- Database specific
{ "cna_assigner": "EEF", "cwe_ids": [ "CWE-639" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81853.json", "unresolved_ranges": [ { "extracted_events": [ { "introduced": "98b03baa8422b94dd13e305bf08b8ee3f7232c7b" }, { "fixed": "3c3e905d47f1155dcc1ca3fb347348b05a66065a" } ], "source": "AFFECTED_FIELD" } ] }- References
-
- https://cna.erlef.org/cves/CVE-2026-81853.html
- https://github.com
- https://osv.dev/vulnerability/EEF-CVE-2026-81853
- https://repo.hex.pm
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81853.json
- https://github.com/ash-project/ash_admin/security/advisories/GHSA-jxr8-hpv2-qp38
- https://nvd.nist.gov/vuln/detail/CVE-2026-81853
- https://github.com/ash-project/ash_admin/commit/3c3e905d47f1155dcc1ca3fb347348b05a66065a
- https://github.com/ash-project/ash_admin