CVE-2026-77956ash-project ash_ai Code Injection
NVD
Vulnerability Summary
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.
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.
CVSS v4.0 Base Metrics — Score 8.9 (HIGH)
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:HAttack VectorLocal
Attack ComplexityLow
Attack RequirementsPresent
Privileges RequiredNone
User InteractionNone
Confidentiality (Vulnerable System)High
Integrity (Vulnerable System)High
Availability (Vulnerable System)High
Confidentiality (Subsequent System)High
Integrity (Subsequent System)High
Availability (Subsequent System)High
Affected & Patched Versions
- ash-project ash_ai >= 0.1.0 and < 1.0.0
- ash-project ash_ai >= 4aab131d40a0bd5a8cf0b3c4eaaa59d49565f3d1 and < e9948254b5659c1143b73dc2f59f457931e64514
- ash-project ash_ai 1.0.0
- ash-project ash_ai e9948254b5659c1143b73dc2f59f457931e64514
What to do
Fix it during your normal patch cycle. No exploitation is confirmed yet.
- Check whether you run ash-project ash_ai and which version.
- Update to a patched version listed above, then confirm the new version.
Timeline
- Aug 31, 2026Published
- Aug 31, 2026Record last modified
Score, severity and exploitation changes are tracked from the day Watchtower started logging them.
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External References
Data last checked: Nov 14, 2026 01:09 UTC