CVE-2026-128069

{"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"}}}}

{}

{"affected": [{"affectedData": [{"product": "rails-html-sanitizer", "vendor": "rails", "versions": [{"status": "affected", "version": "< 1.7.2"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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."}], "id": "CVE-2026-128069", "lastModified": "2026-11-13T18:17:34.757", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 1.6, "impactScore": 2.7, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-11-13T18:17:34.757", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/rails/rails-html-sanitizer/commit/15f764c3563d5dd9b97ad32eaa7454577ccec4b9"}, {"source": "security-advisories@github.com", "url": "https://github.com/rails/rails-html-sanitizer/issues/228"}, {"source": "security-advisories@github.com", "url": "https://github.com/rails/rails-html-sanitizer/releases/tag/v1.7.2"}, {"source": "security-advisories@github.com", "url": "https://github.com/rails/rails-html-sanitizer/security/advisories/GHSA-h7wh-q2qr-458c"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}, {"lang": "en", "value": "CWE-362"}], "source": "security-advisories@github.com", "type": "Primary"}]}

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