{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0.1.0"
              },
              {
                "fixed": "1.0.0"
              }
            ],
            "source": [
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "9be71660e448d601b6b5d1846d227c0b52fb64ac"
            },
            {
              "fixed": "f72b14744996e71df6d73480d617d963f340597b"
            },
            {
              "fixed": "e9948254b5659c1143b73dc2f59f457931e64514"
            }
          ],
          "repo": "https://github.com/ash-project/ash_ai",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-2g59-hg7m-qc83"
  ],
  "database_specific": {
    "cna_assigner": "EEF",
    "cwe_ids": [
      "CWE-94"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77956.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "4aab131d40a0bd5a8cf0b3c4eaaa59d49565f3d1"
          },
          {
            "fixed": "e9948254b5659c1143b73dc2f59f457931e64514"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "Improper Control of Generation of Code (Code Injection) vulnerability in ash-project ash_ai allows a remote, unauthenticated client to execute arbitrary Elixir code.\n\nAshAi.Actions.Prompt evaluates prompt content through EEx.eval_string/2. The documented prompt: fn input, context -\u003e ... 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 \u003c%= System.cmd(...) %\u003e 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.\n\nThis issue affects ash_ai: from 0.1.0 before 1.0.0.",
  "id": "CVE-2026-77956",
  "modified": "2026-09-01T03:30:33.128308261Z",
  "published": "2026-08-31T00:56:26.440Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://cna.erlef.org/cves/CVE-2026-77956.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-77956"
    },
    {
      "type": "WEB",
      "url": "https://repo.hex.pm"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77956.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/ash-project/ash_ai/security/advisories/GHSA-2g59-hg7m-qc83"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-77956"
    },
    {
      "type": "FIX",
      "url": "https://github.com/ash-project/ash_ai/commit/e9948254b5659c1143b73dc2f59f457931e64514"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ash-project/ash_ai"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
      "type": "CVSS_V4"
    }
  ],
  "summary": "EEx template evaluation of prompt content in AshAi enables remote code execution"
}