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 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...

CVE-2026-52761

ModSecurity is an open source, cross platform web application firewall WAF engine for Apache, IIS and Nginx. From 3.0.0 through 3.0.15, the t:utf8toUnicode transformation in src/actions/transformations/utf8tounicode.cc produces wrong output on i386 architecture because snprintf uses sizeof on a...

CVE-2026-52761 ModSecurity: Transformation utf8toUnicode produces wrong output on i386 architecture

ModSecurity is an open source, cross platform web application firewall WAF engine for Apache, IIS and Nginx. From 3.0.0 through 3.0.15, the t:utf8toUnicode transformation in src/actions/transformations/utf8tounicode.cc produces wrong output on i386 architecture because snprintf uses sizeof on a...

CVE-2026-52761 ModSecurity: Transformation utf8toUnicode produces wrong output on i386 architecture

ModSecurity is an open source, cross platform web application firewall WAF engine for Apache, IIS and Nginx. From 3.0.0 through 3.0.15, the t:utf8toUnicode transformation in src/actions/transformations/utf8tounicode.cc produces wrong output on i386 architecture because snprintf uses sizeof on a...

CVE-2026-52761

Affected software: ModSecurity WAF for Apache/IIS/Nginx. A vulnerability in the t:utf8toUnicode transformation (src/actions/transformations/utf8_to_unicode.cc) in 3.0.0–3.0.15, where snprintf uses sizeof on a char pointer instead of the unicode buffer length on i386, can allow bypassing rules tha...

PT-2026-55924

Name of the Vulnerable Software and Affected Versions ModSecurity versions prior to 3.0.16 Description 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. This occurs becau...

PT-2026-55934

Name of the Vulnerable Software and Affected Versions ModSecurity versions 3.0.0 through 3.0.15 Description The t:utf8toUnicode transformation in src/actions/transformations/utf8 to unicode.cc produces incorrect output on i386 architecture. This occurs because the snprintf function uses sizeof on...

[SECURITY] Fedora 44 Update: nginx-mod-modsecurity-1.0.4-12.fc44

The ModSecurity-nginx connector is the connection point between nginx and libmodsecurity ModSecurity v3. Said another way, this project provides a communication channel between nginx and libmodsecurity. This connector is required to use LibModSecurity with nginx. The ModSecurity-nginx connector...

[SECURITY] Fedora 43 Update: nginx-mod-modsecurity-1.0.4-12.fc43

The ModSecurity-nginx connector is the connection point between nginx and libmodsecurity ModSecurity v3. Said another way, this project provides a communication channel between nginx and libmodsecurity. This connector is required to use LibModSecurity with nginx. The ModSecurity-nginx connector...

Fedora 44 : nginx / nginx-mod-brotli / nginx-mod-fancyindex / etc (2026-b8e751787c)

The remote Fedora 44 host has packages installed that are affected by multiple vulnerabilities as referenced in the FEDORA-2026-b8e751787c advisory. nginx-mod-brotli: - Rebuild for 1.30.3 nginx-mod-fancyindex: - Rebuild for 1.30.3 nginx-mod-vts: - Rebuild for 1.30.3 nginx-mod-modsecurity: - Rebui...

[SECURITY] Fedora 43 Update: nginx-mod-modsecurity-1.0.4-11.fc43

The ModSecurity-nginx connector is the connection point between nginx and libmodsecurity ModSecurity v3. Said another way, this project provides a communication channel between nginx and libmodsecurity. This connector is required to use LibModSecurity with nginx. The ModSecurity-nginx connector...

[SECURITY] Fedora 44 Update: nginx-mod-modsecurity-1.0.4-11.fc44

The ModSecurity-nginx connector is the connection point between nginx and libmodsecurity ModSecurity v3. Said another way, this project provides a communication channel between nginx and libmodsecurity. This connector is required to use LibModSecurity with nginx. The ModSecurity-nginx connector...

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

CVE-2026-42268

A flaw was found in ModSecurity, an open-source web application firewall WAF. This vulnerability occurs when an administrator configures a rule that uses @verifySSN, @verifyCPF, or @verifySVNR functions. An unhandled exception, specifically an unsigned integer underflow, can lead to a denial of...

Astra Linux – Vulnerability in ModSecurity-Apache

ModSecurity is an open-source, cross-platform web application firewall WAF engine for Apache, IIS, and Nginx. In versions 2.9.11 and below, an attacker can override the HTTP response’s Content-Type, which can lead to various issues depending on the HTTP scenario. For example, we have demonstrated...

Astra Linux – Vulnerability in ModSecurity-Apache

ModSecurity is an open-source, cross-platform Web application firewall WAF engine for Apache, IIS, and Nginx. Versions up to and including 2.9.8 are vulnerable to denial of service in a specific scenario: when the payload’s content type is application/json, and there is at least one rule that...

Astra Linux – Vulnerability in ModSecurity-Apache

ModSecurity is an open-source, cross-platform Web Application Firewall WAF engine for Apache, IIS, and Nginx. Versions prior to 2.9.10 contain a denial-of-service vulnerability similar to GHSA-859r-vvv8-rm8r/CVE-2025-47947. The sanitiseArg and sanitizeArg – it’s the same action, just a alias...

[SECURITY] Fedora 42 Update: nginx-mod-modsecurity-1.0.4-10.fc42

The ModSecurity-nginx connector is the connection point between nginx and libmodsecurity ModSecurity v3. Said another way, this project provides a communication channel between nginx and libmodsecurity. This connector is required to use LibModSecurity with nginx. The ModSecurity-nginx connector...

[SECURITY] Fedora 43 Update: nginx-mod-modsecurity-1.0.4-10.fc43

The ModSecurity-nginx connector is the connection point between nginx and libmodsecurity ModSecurity v3. Said another way, this project provides a communication channel between nginx and libmodsecurity. This connector is required to use LibModSecurity with nginx. The ModSecurity-nginx connector...

[SECURITY] Fedora 44 Update: nginx-mod-modsecurity-1.0.4-10.fc44

The ModSecurity-nginx connector is the connection point between nginx and libmodsecurity ModSecurity v3. Said another way, this project provides a communication channel between nginx and libmodsecurity. This connector is required to use LibModSecurity with nginx. The ModSecurity-nginx connector...