CVE Watch14 jul 2026

CVE-2026-52747

ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. Prior to 3.0.16, the multipar

CVSS

8.6

Alto

EPSS

0.5%

p38

KEV

—

Exploit Today

0-100

Publicado: 10 jul 2026 · Última mod.: 14 jul 2026 · CWE-180

EPSS · 30d

0.5%EPSS · 30 días0.5%

2026-07-112026-07-17

Descripción técnica

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.

Referencias oficiales

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