CVE-2026-42268

ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. From 3.0.0 to before 3.0.15, there is an unhandled exception (std::out_of_range) caused by unsigned integer underflow in libmodsecurity3 if the user (administrator) uses a rule any of @verifySSN, @verifyCPF, or @verifySVNR. This vulnerability is fixed in 3.0.15.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-vwr3-7x7g-7p9w	Exploit Vendor Advisory
https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-vwr3-7x7g-7p9w	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:owasp:modsecurity:*:*:*:*:*:*:*:*

History

26 Oct 2026, 14:10

Type	Values Removed	Values Added
Summary		(es) ModSecurity es un motor de cortafuegos de aplicaciones web (WAF) de código abierto y multiplataforma para Apache, IIS y Nginx. Desde la versión 3.0.0 hasta antes de la 3.0.15, existe una excepción no controlada (std::out_of_range) causada por un desbordamiento negativo de entero sin signo (unsigned integer underflow) en libmodsecurity3 si el usuario (administrador) utiliza una regla cualquiera de @verifySSN, @verifyCPF o @verifySVNR. Esta vulnerabilidad se corrige en la versión 3.0.15.

Information

Published : 2026-05-12 22:16

Updated : 2026-10-26 14:10

NVD link : CVE-2026-42268

Mitre link : CVE-2026-42268

CVE.ORG link : CVE-2026-42268

JSON object : View

Products Affected

owasp

modsecurity

CWE

CWE-191

Integer Underflow (Wrap or Wraparound)

CWE-248

Uncaught Exception

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