AshAi.Actions.Prompt evaluates prompt content through EEx.eval_string/2. The documented prompt: fn input, context -> ... end form lets the prompt content be built from action arguments, so when a prompt action's text incorporates request data, that attacker-controlled text is compiled and run as an EEx template (Elixir source). Content such as <%= System.cmd(...) %> therefore executes on the server before any model request is made, requiring no authentication beyond reaching a prompt action. The fix stops evaluating function-supplied prompt content as EEx; only statically configured templates are evaluated.
This issue affects ash_ai: from 0.1.0 before 1.0.0.
Metrics
Affected Vendors & Products
No advisories yet.
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
Mon, 31 Aug 2026 17:30:00 +0000
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ssvc
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Mon, 31 Aug 2026 15:30:00 +0000
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cvssV4_0
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cvssV4_0
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Mon, 31 Aug 2026 01:00:00 +0000
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| Description | Improper Control of Generation of Code (Code Injection) vulnerability in ash-project ash_ai allows a remote, unauthenticated client to execute arbitrary Elixir code. AshAi.Actions.Prompt evaluates prompt content through EEx.eval_string/2. The documented prompt: fn input, context -> ... end form lets the prompt content be built from action arguments, so when a prompt action's text incorporates request data, that attacker-controlled text is compiled and run as an EEx template (Elixir source). Content such as <%= System.cmd(...) %> therefore executes on the server before any model request is made, requiring no authentication beyond reaching a prompt action. The fix stops evaluating function-supplied prompt content as EEx; only statically configured templates are evaluated. This issue affects ash_ai: from 0.1.0 before 1.0.0. | |
| Title | EEx template evaluation of prompt content in AshAi enables remote code execution | |
| First Time appeared |
Ash-project
Ash-project ash Ai |
|
| Weaknesses | CWE-94 | |
| CPEs | cpe:2.3:a:ash-project:ash_ai:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Ash-project
Ash-project ash Ai |
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| References |
| |
| Metrics |
cvssV4_0
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Projects
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Status: PUBLISHED
Assigner: EEF
Published:
Updated: 2026-08-31T16:01:41.879Z
Reserved: 2026-08-30T17:30:01.409Z
Link: CVE-2026-77956
Updated: 2026-08-31T16:01:38.306Z
Status : Received
Published: 2026-08-31T01:16:49.563
Modified: 2026-08-31T16:19:12.900
Link: CVE-2026-77956
No data.
OpenCVE Enrichment
Updated: 2026-08-31T17:15:03Z