CVE-2025-48043: Ash Framework Filter Authorization Bypass Vulnerability
Summary
CVE-2025-48043: Ash Framework: Filter authorization misapplies impossible bypass/runtime policies. Affects ash versions < 3.6.2. Fixed in 3.6.2. How to fix ↓
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Background
The Ash Framework is an open-source framework designed for building APIs and applications in Elixir. It provides a robust set of features for managing resources, including authorization policies that control access to data. However, a recent vulnerability has been identified in its filter authorization mechanism, which could lead to unauthorized data exposure under specific conditions.
Vulnerability Detail
The vulnerability arises from two edge cases in the filter authorization logic. First, policies that are designed to bypass checks may compile in a way that allows unauthorized access if the condition is never true at runtime. Second, scenarios that result in no applicable checks are incorrectly treated as valid, leading to permissive filters. This can allow unauthorized records to be returned during read operations, posing a significant security risk.
How To Fix
Latest published version: 3.37.0 as of 23 Oct 2026
Upgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.
If you need the minimum change
3.6.2
This is the first release that contains the fix.
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Workaround
As a temporary workaround, avoid using bypass policies with conditions that can only be resolved at runtime and may never pass. Instead, use explicit authorize_if or forbid_if blocks. Additionally, implement a final forbid_if always() guard for sensitive reads to prevent unauthorized access until the package can be updated.
Conclusion
The CVE-2025-48043 vulnerability in the Ash Framework poses a significant risk by allowing unauthorized access to data through flawed filter authorization policies. It is essential to update to the patched version and implement workarounds to safeguard your application.
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FAQ
CVE-2025-48043 is a vulnerability in the Ash Framework that allows unauthorized data access due to improper handling of filter authorization policies.
If your application uses filter-based authorization in the Ash Framework, it may unintentionally return unauthorized records, exposing sensitive data.
You should update the Ash package to version 3.6.2 or later to apply the necessary fixes. Additionally, consider implementing the suggested workarounds.
As of now, there are no publicly known exploits for CVE-2025-48043, but it is crucial to address the vulnerability to prevent potential attacks.
You can use Vulert, which monitors and alerts in real-time for open-source vulnerabilities in your software. You can check if your application is affected by this vulnerability using the Vulert playground without any signup.
References
Related vulnerabilities
Recent vulnerabilities recorded for ash.
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