CVE-2026-81852
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| ash-project | ash_admin | 0.10.8 < 1.3.1 | affected |
| ash-project | ash_admin | 99b8daed7b2f79d82fcd9e89338d41b0e1564aa7 < bc7a1cdf873b16971a8efec35d085f8bb706314f | affected |
Weaknesses
- CWE-330: CWE-330 Use of Insufficiently Random Values
References
- https://github.com/ash-project/ash_admin/security/advisories/GHSA-whfj-rrrp-j597
- https://cna.erlef.org/cves/CVE-2026-81852.html
- https://osv.dev/vulnerability/EEF-CVE-2026-81852
- https://github.com/ash-project/ash_admin/commit/bc7a1cdf873b16971a8efec35d085f8bb706314f
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