EEF-CVE-2026-81852
AshAdmin ships a hardcoded CSP nonce, allowing nonce-based CSP bypass
Quick fix
EEF-CVE-2026-81852 — ash_admin: upgrade to the fixed version with the command below.
mix deps.update ash_adminDetails
## Summary
Use of Insufficiently Random Values vulnerability in ash-project ash\_admin ships a hardcoded, publicly known CSP nonce, defeating nonce-based Content-Security-Policy protection.
When mounted without :csp\_nonce\_assign\_key, AshAdmin.Router.ash\_admin/2 defaulted the img, style, and script nonces to the literal constant ash\_admin-Ed55GFnX, which AshAdmin.Layouts wrote verbatim into the nonce attribute of its inline <style> and <script> tags on every response. The value is a compile-time constant published in the repository and is never rotated per request. If an application's CSP script-src allow-lists that documented default, any HTML-injection sink on an admin page can reuse the known nonce to run inline scripts the policy was meant to block. The fix generates a fresh random nonce per request.
This issue affects ash\_admin: from 0.10.8 before 1.3.1.
## Configuration
The application mounts AshAdmin without :csp\_nonce\_assign\_key and enforces a nonce-based CSP whose script-src allow-lists the default ash\_admin-Ed55GFnX value, and has a separate HTML-injection sink on an admin page.
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