CVE Watch9 nov 2026

CVE-2026-104259

ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. Prior to 2.9.15 and 3.0.17, m

CVSS

5.4

Medio

EPSS

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KEV

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Exploit Today

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0-100

Publicado: 9 nov 2026 · Última mod.: 9 nov 2026 · CWE-670

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. Prior to 2.9.15 and 3.0.17, msre_fn_removeComments_execute in apache2/re_tfns.c and inplace() in src/actions/transformations/remove_comments.cc implement t:removeComments by copying the character immediately after a comment terminator without re-evaluating it. Adjacent comments can therefore leave a later comment in the transformed value, allowing inline-comment obfuscation to bypass rules that depend on comment stripping. When a comment terminator is the final content, the same copy reads one byte beyond the input buffer. This issue is fixed in versions 2.9.15 and 3.0.17.

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