ash-project ash_admin up to 1.3.0 CSP Nonce Generation AshAdmin.Router.ash_admin csp_nonce_assign_key random values

Summaryinfo

A vulnerability was found in ash-project ash_admin up to 1.3.0. It has been declared as problematic. This issue affects the function AshAdmin.Router.ash_admin of the component CSP Nonce Generation. Such manipulation of the argument csp_nonce_assign_key leads to random values. This vulnerability is traded as CVE-2026-81852. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in ash-project ash_admin up to 1.3.0. It has been rated as problematic. Affected by this issue is the function AshAdmin.Router.ash_admin of the component CSP Nonce Generation. The manipulation of the argument csp_nonce_assign_key with an unknown input leads to a random values vulnerability. Using CWE to declare the problem leads to CWE-330. The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers. Impacted is confidentiality. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-81852 since 08/31/2026. The exploitation is known to be difficult. The attack may be launched remotely. Additional levels of successful authentication are needed for exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1600.001 by the MITRE ATT&CK project.

Upgrading to version 1.3.1 eliminates this vulnerability.

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Productinfo

Type

• Project Management Software

Vendor

• ash-project

Name

• ash_admin

Version

• 1.0
• 1.1
• 1.2
• 1.3.0

Website

• Product: https://github.com/ash-project/ash_admin/

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