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

14 May 2026, 14:49

Type	Values Removed	Values Added
First Time		Owasp Owasp modsecurity
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
References	~~() https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-vwr3-7x7g-7p9w -~~	() https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-vwr3-7x7g-7p9w - Exploit, Vendor Advisory
CPE		cpe:2.3:a:owasp:modsecurity::::::::

14 May 2026, 13:16

Type	Values Removed	Values Added
References	~~() https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-vwr3-7x7g-7p9w -~~	() https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-vwr3-7x7g-7p9w -

12 May 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-12 22:16

Updated : 2026-05-14 14:49

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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