{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-81852",
        "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "state": "PUBLISHED",
        "assignerShortName": "EEF",
        "dateReserved": "2026-08-30T23:15:02.378Z",
        "datePublished": "2026-08-31T02:29:14.304Z",
        "dateUpdated": "2026-08-31T02:29:14.304Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "collectionURL": "https://repo.hex.pm",
                    "cpes": [
                        "cpe:2.3:a:ash-project:ash_admin:*:*:*:*:*:*:*:*"
                    ],
                    "defaultStatus": "unaffected",
                    "modules": [
                        "'Elixir.AshAdmin.Router'",
                        "'Elixir.AshAdmin.Layouts'"
                    ],
                    "packageName": "ash_admin",
                    "packageURL": "pkg:hex/ash_admin",
                    "product": "ash_admin",
                    "programFiles": [
                        "lib/ash_admin/router.ex",
                        "lib/ash_admin/components/layouts.ex"
                    ],
                    "repo": "https://github.com/ash-project/ash_admin",
                    "vendor": "ash-project",
                    "versions": [
                        {
                            "lessThan": "1.3.1",
                            "status": "affected",
                            "version": "0.10.8",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "collectionURL": "https://github.com",
                    "cpes": [
                        "cpe:2.3:a:ash-project:ash_admin:*:*:*:*:*:*:*:*"
                    ],
                    "defaultStatus": "unaffected",
                    "modules": [
                        "'Elixir.AshAdmin.Router'",
                        "'Elixir.AshAdmin.Layouts'"
                    ],
                    "packageName": "ash-project/ash_admin",
                    "packageURL": "pkg:github/ash-project/ash_admin",
                    "product": "ash_admin",
                    "programFiles": [
                        "lib/ash_admin/router.ex",
                        "lib/ash_admin/components/layouts.ex"
                    ],
                    "repo": "https://github.com/ash-project/ash_admin",
                    "vendor": "ash-project",
                    "versions": [
                        {
                            "lessThan": "bc7a1cdf873b16971a8efec35d085f8bb706314f",
                            "status": "affected",
                            "version": "99b8daed7b2f79d82fcd9e89338d41b0e1564aa7",
                            "versionType": "git"
                        }
                    ]
                }
            ],
            "configurations": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "base64": false,
                            "type": "text/html",
                            "value": "<p>The application mounts AshAdmin without <code>:csp_nonce_assign_key</code> and enforces a nonce-based CSP whose <code>script-src</code> allow-lists the default <code>ash_admin-Ed55GFnX</code> value, and has a separate HTML-injection sink on an admin page.</p>"
                        },
                        {
                            "base64": false,
                            "type": "text/markdown",
                            "value": "The application mounts AshAdmin without `:csp_nonce_assign_key` and enforces a nonce-based CSP whose `script-src` allow-lists the default `ash_admin-Ed55GFnX` value, and has a separate HTML-injection sink on an admin page."
                        }
                    ],
                    "value": "The application mounts AshAdmin without :csp_nonce_assign_key and enforces a nonce-based CSP whose script-src allow-lists the default ash_admin-Ed55GFnX value, and has a separate HTML-injection sink on an admin page."
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "cpeMatch": [
                                {
                                    "criteria": "cpe:2.3:a:ash-project:ash_admin:*:*:*:*:*:*:*:*",
                                    "versionEndExcluding": "1.3.1",
                                    "versionStartIncluding": "0.10.8",
                                    "vulnerable": true
                                }
                            ],
                            "negate": false,
                            "operator": "OR"
                        }
                    ],
                    "operator": "AND"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "type": "finder",
                    "value": "Peter Ullrich"
                },
                {
                    "lang": "en",
                    "type": "reporter",
                    "value": "Peter Ullrich"
                },
                {
                    "lang": "en",
                    "type": "remediation developer",
                    "value": "Zach Daniel / Ash Project"
                },
                {
                    "lang": "en",
                    "type": "coordinator",
                    "value": "Jonatan Männchen / EEF"
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "base64": false,
                            "type": "text/html",
                            "value": "<p>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.</p>\n<p>When mounted without <code>:csp_nonce_assign_key</code>, <code>AshAdmin.Router.ash_admin/2</code> defaulted the img, style, and script nonces to the literal constant <code>ash_admin-Ed55GFnX</code>, which <code>AshAdmin.Layouts</code> wrote verbatim into the <code>nonce</code> attribute of its inline <code>&lt;style&gt;</code> and <code>&lt;script&gt;</code> 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 <code>script-src</code> 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.</p>\n<p>This issue affects ash_admin: from 0.10.8 before 1.3.1.</p>"
                        },
                        {
                            "base64": false,
                            "type": "text/markdown",
                            "value": "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 `<style>` and `<script>` 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."
                        }
                    ],
                    "value": "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 <style> and <script> 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."
                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-63",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-63 Cross-Site Scripting (XSS)"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "Automatable": "NOT_DEFINED",
                        "Recovery": "NOT_DEFINED",
                        "Safety": "NOT_DEFINED",
                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "attackVector": "NETWORK",
                        "baseScore": 2.1,
                        "baseSeverity": "LOW",
                        "privilegesRequired": "NONE",
                        "providerUrgency": "NOT_DEFINED",
                        "subAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "userInteraction": "ACTIVE",
                        "valueDensity": "NOT_DEFINED",
                        "vectorString": "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",
                        "version": "4.0",
                        "vulnAvailabilityImpact": "NONE",
                        "vulnConfidentialityImpact": "LOW",
                        "vulnIntegrityImpact": "LOW",
                        "vulnerabilityResponseEffort": "NOT_DEFINED"
                    },
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ]
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-330",
                            "description": "CWE-330 Use of Insufficiently Random Values",
                            "lang": "en",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
                "shortName": "EEF",
                "dateUpdated": "2026-08-31T02:29:14.304Z"
            },
            "references": [
                {
                    "tags": [
                        "vendor-advisory",
                        "related"
                    ],
                    "url": "https://github.com/ash-project/ash_admin/security/advisories/GHSA-whfj-rrrp-j597"
                },
                {
                    "tags": [
                        "related"
                    ],
                    "url": "https://cna.erlef.org/cves/CVE-2026-81852.html"
                },
                {
                    "tags": [
                        "related"
                    ],
                    "url": "https://osv.dev/vulnerability/EEF-CVE-2026-81852"
                },
                {
                    "tags": [
                        "patch"
                    ],
                    "url": "https://github.com/ash-project/ash_admin/commit/bc7a1cdf873b16971a8efec35d085f8bb706314f"
                }
            ],
            "source": {
                "discovery": "EXTERNAL"
            },
            "title": "AshAdmin ships a hardcoded CSP nonce, allowing nonce-based CSP bypass"
        }
    }
}