CVE-2026-126079

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{}

{"affected": [{"affectedData": [{"product": "rails", "vendor": "rails", "versions": [{"status": "affected", "version": "< 8.0.5.2"}, {"status": "affected", "version": ">= 8.1, < 8.1.4.1"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Action View is a framework for handling view template lookup and rendering and provides view helpers for building HTML. Prior to 8.1.4.1 and 8.0.5.2, with the HTML5 sanitizer (Rails::HTML5::Sanitizer, the default vendor on CRuby for applications using load_defaults 7.1 or later), Nokogiri before 1.19.5 serializes < and > unescaped inside attribute values. The Action View text helpers highlight and simple_format sanitize their input and then process the resulting HTML as a string: highlight splits it on tag boundaries to insert matches, and simple_format splits it into paragraphs on blank lines. An unescaped > or a blank line inside an attribute value could cause markup in that value, which the sanitizer left inert, to be emitted as live elements in the helper's html_safe output, possibly leading to XSS. Applications that use the HTML5 sanitizer and pass untrusted text to highlight, or to simple_format with html_options, are affected. This issue is fixed in versions 8.1.4.1 and 8.0.5.2."}], "id": "CVE-2026-126079", "lastModified": "2026-11-12T22:18:35.610", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.7, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-11-10T21:19:26.513", "references": [{"source": "security-advisories@github.com", "url": "http://github.com/rails/rails/commit/adc3a32d4abea77ed3aacf6f5fb71cfc005bef73"}, {"source": "security-advisories@github.com", "url": "https://github.com/rails/rails/commit/009ea68342d05d02087c04dae7faaa4e4c1def11"}, {"source": "security-advisories@github.com", "url": "https://github.com/rails/rails/releases/tag/v8.0.5.2"}, {"source": "security-advisories@github.com", "url": "https://github.com/rails/rails/releases/tag/v8.1.4.1"}, {"source": "security-advisories@github.com", "url": "https://github.com/rails/rails/security/advisories/GHSA-2p2f-4rq4-gjwc"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,8.0.5.2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[8.1,8.1.4.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "rails", "source": "cna", "vendor": "rails"}, "product": "rails", "vendor": "rails"}], "created": "2026-11-12T01:00:09.863833+00:00", "updated": "2026-11-13T11:30:07.805503+00:00", "vendors": ["rails", "rails$PRODUCT$rails"]}