Quick answers
- Is CVE-2026-77956 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-77956 being exploited in the wild.
- How severe is CVE-2026-77956?
- Informational severity, with a CVSS score of 9.8, published 31 August 2026.
- Which products and versions are affected?
- Ash-Project Ash Ai 0.1.0 before 1.0.0.
- Is there a fix for CVE-2026-77956?
- A patch was published on 2026-08-31: Fix available in version 1.0.0 and later Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-77956 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-77956?
- Check whether you run Ash-Project Ash Ai at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is a code injection flaw in AshAi.Actions.Prompt, which uses EEx.eval_string/2 to evaluate prompt content. When prompt templates are built from user-supplied input (e.g., through the prompt: fn input, context -> ... end pattern), attacker-controlled data is compiled and executed as Elixir source code before any model request is made. An attacker can embed expressions like <%= System.cmd(...) %> to run arbitrary commands. No authentication is required—only network access to a prompt action endpoint. The fix restricts EEx evaluation to statically configured templates only, preventing dynamic compilation of user input.
Affected products
- ash-project ash_ai 0.1.0 before 1.0.0
Timeline
- 2026-08-31: disclosed
- 2026-08-31: patched: Fix available in version 1.0.0 and later