CVE-2026-42268: Integer Underflow (Wrap or Wraparound)

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::outofrange caused by unsigned integer underflow in libmodsecurity3 if the user administrator uses a rule any of @verifySSN...

Modsecurity numerical error vulnerabilities

Modsecurity is an open-source web traffic security processing library developed by OWASP ModSecurity. Versions of Modsecurity from 3.0.0 to 3.0.15 contained a numerical error vulnerability. This vulnerability stemmed from an unsigned integer underflow, which led to unhandled exceptions and could...

choreo-waf-poc

waf-poc — Choreo CP WAF Bake-Off OpenResty Three-way WAF ev...

Adversarial SQL Injection Generation with LLM-Based Architectures

SQL injection SQLi attacks are still one of the serious attacks ranked in the Open Worldwide Application Security Project OWASP Top 10 threats. Today, with advances in Artificial Intelligence AI, especially in Large Language Models LLMs, an opportunity has been created for automating adversarial...

BIT-MODSECURITY2-2026-30923 libModSecurity3 denial of service via segfault when using t:hexDecode on single-character query strings

ModSecurity is an open source, cross platform web application firewall WAF engine for Apache, IIS and Nginx. Libmodsecurity is one component of the ModSecurity v3 project. A segmentation fault occurs when a rule using the t:hexDecode transformation inspects a query string parameter containing a...

SUSE CVE-2026-30923

ModSecurity is an open source, cross platform web application firewall WAF engine for Apache, IIS and Nginx. Libmodsecurity is one component of the ModSecurity v3 project. A segmentation fault occurs when a rule using the t:hexDecode transformation inspects a query string parameter containing a...

Linux Distros Unpatched Vulnerability : CVE-2026-42268

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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...

PT-2026-38473

ModSecurity is an open source, cross platform web application firewall WAF engine for Apache, IIS and Nginx. Libmodsecurity is one component of the ModSecurity v3 project. A segmentation fault occurs when a rule using the t:hexDecode transformation inspects a query string parameter containing a...

UBUNTU-CVE-2026-30923

ModSecurity is an open source, cross platform web application firewall WAF engine for Apache, IIS and Nginx. Libmodsecurity is one component of the ModSecurity v3 project. A segmentation fault occurs when a rule using the t:hexDecode transformation inspects a query string parameter containing a...

CVE-2026-30923

ModSecurity is an open source, cross platform web application firewall WAF engine for Apache, IIS and Nginx. Libmodsecurity is one component of the ModSecurity v3 project. A segmentation fault occurs when a rule using the t:hexDecode transformation inspects a query string parameter containing a...

CVE-2026-30923 libModSecurity3 denial of service via segfault when using t:hexDecode on single-character query strings

ModSecurity is an open source, cross platform web application firewall WAF engine for Apache, IIS and Nginx. Libmodsecurity is one component of the ModSecurity v3 project. A segmentation fault occurs when a rule using the t:hexDecode transformation inspects a query string parameter containing a...

CVE-2026-30923 libModSecurity3 denial of service via segfault when using t:hexDecode on single-character query strings

ModSecurity is an open source, cross platform web application firewall WAF engine for Apache, IIS and Nginx. Libmodsecurity is one component of the ModSecurity v3 project. A segmentation fault occurs when a rule using the t:hexDecode transformation inspects a query string parameter containing a...

CVE-2026-30923

ModSecurity is an open source, cross platform web application firewall WAF engine for Apache, IIS and Nginx. Libmodsecurity is one component of the ModSecurity v3 project. A segmentation fault occurs when a rule using the t:hexDecode transformation inspects a query string parameter containing a...

EUVD-2026-27422

ModSecurity is an open source, cross platform web application firewall WAF engine for Apache, IIS and Nginx. Libmodsecurity is one component of the ModSecurity v3 project. A segmentation fault occurs when a rule using the t:hexDecode transformation inspects a query string parameter containing a...

Modsecurity buffer error vulnerability

Modsecurity is an open-source web traffic security processing library developed by OWASP ModSecurity. Versions of Modsecurity prior to 3.0.15 contained a buffer error vulnerability. This vulnerability arises from using the t:hexDecode conversion in rule checks for query string parameters containi...

PT-2026-36538

Name of the Vulnerable Software and Affected Versions ModSecurity versions 3.0.0 through 3.0.14 Description An unhandled exception std::out of range occurs in libmodsecurity3 due to an unsigned integer underflow. This issue is triggered when an administrator utilizes any of the following rules:...

PT-2026-36537

Name of the Vulnerable Software and Affected Versions libModSecurity3 versions prior to 3.0.15 Description A segmentation fault occurs when a rule using the t:hexDecode transformation inspects a query string parameter containing a single character. This allows an attacker to crash worker processe...

Exploit for CVE-2026-41940

SessionScribe - CVE-2026-41940 Detection, mitigation, and rev...

Fedora 44 : nginx / nginx-mod-brotli / nginx-mod-fancyindex / etc (2026-4de4d247a0)

The remote Fedora 44 host has packages installed that are affected by multiple vulnerabilities as referenced in the FEDORA-2026-4de4d247a0 advisory. nginx-mod-brotli: - Rebuild for 1.28.3 nginx-mod-fancyindex: - Rebuild for 1.28.3 nginx-mod-naxsi: - Rebuild for 1.28.3 nginx-mod-headers-more: -...

modsecurity3 -- multiple vulnerabilities

ModSecurity is an open source web application firewall engine. According to the upstream changelog, multiple vulnerabilities have been fixed. CVE-2026-42268: unsigned integer underflow in verify operators CVE-2026-30923: buffer overflow in hexdecode...