CVE-2026-52747

{"id": "CVE-2026-52747", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-52747", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-13T17:48:09.249154Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.6, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 4.0, "exploitabilityScore": 3.9}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.6, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 4.0, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "owasp-modsecurity", "product": "ModSecurity", "versions": [{"status": "affected", "version": "< 3.0.16"}]}]}], "published": "2026-07-10T22:16:42.697", "references": [{"url": "https://github.com/owasp-modsecurity/ModSecurity/commit/875504c2758169c41be1ad2f0cc64d896b7815d7", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/owasp-modsecurity/ModSecurity/releases/tag/v3.0.16", "tags": ["Product", "Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-rcw9-2f5r-7p88", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-rcw9-2f5r-7p88", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-180"}]}], "descriptions": [{"lang": "en", "value": "ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. Prior to 3.0.16, the multipart/form-data request body parser in libmodsecurity silently removes embedded line breaks from non-file form-field values before exporting them to ARGS and ARGS_POST because src/request_body_processor/multipart.cc overwrites reserved bytes in m_reserve instead of appending the current buffer. This creates a parser differential between ModSecurity and backend applications that preserve line breaks in form fields, allowing rules that inspect ARGS or ARGS_POST to miss payloads whose dangerous syntax depends on a line break. This issue is fixed in version 3.0.16."}, {"lang": "es", "value": "ModSecurity es un motor de cortafuegos de aplicaciones web (WAF) de c\u00f3digo abierto y multiplataforma para Apache, IIS y Nginx. Antes de la versi\u00f3n 3.0.16, el analizador del cuerpo de la solicitud multipart/form-data en libmodsecurity elimina silenciosamente los saltos de l\u00ednea incrustados de los valores de campos de formulario que no son archivos antes de exportarlos a ARGS y ARGS_POST porque src/request_body_processor/multipart.cc sobrescribe los bytes reservados en m_reserve en lugar de a\u00f1adir el b\u00fafer actual. Esto crea un diferencial de analizador entre ModSecurity y las aplicaciones de backend que preservan los saltos de l\u00ednea en los campos de formulario, permitiendo que las reglas que inspeccionan ARGS o ARGS_POST pasen por alto cargas \u00fatiles cuya sintaxis peligrosa depende de un salto de l\u00ednea. Este problema se solucion\u00f3 en la versi\u00f3n 3.0.16."}], "lastModified": "2026-10-25T15:10:00.147", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:owasp:modsecurity:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7EA032F7-7C09-40A5-9936-C6C59E45DACE", "versionEndExcluding": "3.0.16"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}