{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0.10.8"
              },
              {
                "fixed": "1.3.1"
              }
            ],
            "source": [
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "4028b200cfef3fc88cff5daa0bafb8f496d3a0e3"
            },
            {
              "fixed": "91da87c1c23cd6199ba1b0a1c8849a4c605130cc"
            },
            {
              "fixed": "bc7a1cdf873b16971a8efec35d085f8bb706314f"
            }
          ],
          "repo": "https://github.com/ash-project/ash_admin",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-whfj-rrrp-j597"
  ],
  "database_specific": {
    "cna_assigner": "EEF",
    "cwe_ids": [
      "CWE-330"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81852.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "99b8daed7b2f79d82fcd9e89338d41b0e1564aa7"
          },
          {
            "fixed": "bc7a1cdf873b16971a8efec35d085f8bb706314f"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "Use of Insufficiently Random Values vulnerability in ash-project ash_admin ships a hardcoded, publicly known CSP nonce, defeating nonce-based Content-Security-Policy protection.\n\nWhen mounted without :csp_nonce_assign_key, AshAdmin.Router.ash_admin/2 defaulted the img, style, and script nonces to the literal constant ash_admin-Ed55GFnX, which AshAdmin.Layouts wrote verbatim into the nonce attribute of its inline \u003cstyle\u003e and \u003cscript\u003e tags on every response. The value is a compile-time constant published in the repository and is never rotated per request. If an application's CSP script-src allow-lists that documented default, any HTML-injection sink on an admin page can reuse the known nonce to run inline scripts the policy was meant to block. The fix generates a fresh random nonce per request.\n\nThis issue affects ash_admin: from 0.10.8 before 1.3.1.",
  "id": "CVE-2026-81852",
  "modified": "2026-09-03T03:30:38.992633521Z",
  "published": "2026-08-31T02:29:14.304Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://cna.erlef.org/cves/CVE-2026-81852.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-81852"
    },
    {
      "type": "WEB",
      "url": "https://repo.hex.pm"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81852.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/ash-project/ash_admin/security/advisories/GHSA-whfj-rrrp-j597"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-81852"
    },
    {
      "type": "FIX",
      "url": "https://github.com/ash-project/ash_admin/commit/bc7a1cdf873b16971a8efec35d085f8bb706314f"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ash-project/ash_admin"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "AshAdmin ships a hardcoded CSP nonce, allowing nonce-based CSP bypass"
}