{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-128069",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-11-12T21:24:51.129Z",
        "datePublished": "2026-11-13T17:17:47.954Z",
        "dateUpdated": "2026-11-13T17:17:47.954Z"
    },
    "containers": {
        "cna": {
            "title": "rails-html-sanitizer: Possible XSS via shared scrubber state in concurrent calls",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-79",
                            "lang": "en",
                            "description": "CWE-79: Improper Neutralization of Input During Web Page Generation",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-362",
                            "lang": "en",
                            "description": "CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "HIGH",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 4.7,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "LOW",
                        "integrityImpact": "LOW",
                        "privilegesRequired": "NONE",
                        "scope": "CHANGED",
                        "userInteraction": "REQUIRED",
                        "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/rails/rails-html-sanitizer/security/advisories/GHSA-h7wh-q2qr-458c",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/rails/rails-html-sanitizer/security/advisories/GHSA-h7wh-q2qr-458c"
                },
                {
                    "name": "https://github.com/rails/rails-html-sanitizer/issues/228",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/rails/rails-html-sanitizer/issues/228"
                },
                {
                    "name": "https://github.com/rails/rails-html-sanitizer/commit/15f764c3563d5dd9b97ad32eaa7454577ccec4b9",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/rails/rails-html-sanitizer/commit/15f764c3563d5dd9b97ad32eaa7454577ccec4b9"
                },
                {
                    "name": "https://github.com/rails/rails-html-sanitizer/releases/tag/v1.7.2",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/rails/rails-html-sanitizer/releases/tag/v1.7.2"
                }
            ],
            "affected": [
                {
                    "vendor": "rails",
                    "product": "rails-html-sanitizer",
                    "versions": [
                        {
                            "version": "< 1.7.2",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-11-13T17:17:47.954Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. Before 1.7.2, the HTML4 and HTML5 variants of Rails::HTML::SafeListSanitizer reuse one Rails::HTML::PermitScrubber across calls and mutate its tags and attributes without synchronization. In a multithreaded process, concurrent sanitize calls using different tags: or attributes: options can interleave and cause one call to use the other call's allowlist. If a permissive call admits a script element or event-handler attribute, output expected to be sanitized under a stricter policy can retain it and cause cross-site scripting when rendered. Applications that are single-threaded, use one identical allowlist everywhere, or provide a separate scrubber: are not affected. This issue is fixed in version 1.7.2."
                }
            ],
            "source": {
                "advisory": "GHSA-h7wh-q2qr-458c",
                "discovery": "UNKNOWN"
            }
        }
    }
}