CVE-2026-82681

Summary

Improper Encoding or Escaping of Output vulnerability in ash-project ash_admin lets an attacker who controls a record's string primary key rewrite the target of AshAdmin's row-action links.

The Table, DataTable, and Show components built row-action URLs by raw string interpolation, splicing the primary key (and table, domain, and resource names) into the query string without URL-encoding. Ash resources routinely use user-settable string primary keys (slugs, emails). Because Plug.Conn.Query resolves duplicate parameters last-wins and primary_key is interpolated last, a stored key such as foo&action_type=destroy injects parameters that override the link, so an admin clicking edit is sent to a destroy form or an arbitrary resource; a # truncates the query into a fragment. The fix builds every link with URI.encode_query/1, encoding all interpolated values.

This issue affects ash_admin: from 0.3.0-rc.0 before 1.3.1.

Affected Software

Weaknesses

• CWE-116: CWE-116 Improper Encoding or Escaping of Output

References

• https://github.com/ash-project/ash_admin/security/advisories/GHSA-j89q-xjrh-c26p
• https://cna.erlef.org/cves/CVE-2026-82681.html
• https://osv.dev/vulnerability/EEF-CVE-2026-82681
• https://github.com/ash-project/ash_admin/commit/8e8ef91e8ba07498053887c6212f8b0f08178df6

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