CVE-2026-21876 OWASP CRS has multipart bypass using multiple content-type parts

The OWASP core rule set CRS is a set of generic attack detection rules for use with compatible web application firewalls. Prior to versions 4.22.0 and 3.3.8, the current rule 922110 has a bug when processing multipart requests with multiple parts. When the first rule in a chain iterates over a...

CVE-2026-21876

CVE-2026-21876 : The OWASP ModSecurity Core Rule Set (CRS) had a bug in rule 922110 that affects multipart requests. In earlier versions (before 4.22.0 and 3.3.8), when a chain iterates over a collection (e.g., MULTIPART_PART_HEADERS), capture variables TX:0 and TX:1 are overwritten on each itera...

CVE-2026-21876 OWASP CRS has multipart bypass using multiple content-type parts

The OWASP core rule set CRS is a set of generic attack detection rules for use with compatible web application firewalls. Prior to versions 4.22.0 and 3.3.8, the current rule 922110 has a bug when processing multipart requests with multiple parts. When the first rule in a chain iterates over a...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: mod_security (UTSA-2025-593903)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-593903 advisory. The OWASP ModSecurity Core Rule Set CRS is affected by a partial rule set bypass for HTTP multipart requests by submitting a payload that uses a character encoding...

OESA-2025-1561 mod_security security update

This software is also called Modsec,it is an open-source web application firewall. It is designed for Apache HTTP Server.ModSecurity is commonly deployed to provide protections against generic classed of vulnerabilities.The install of this package is easy and you can read the README.TXT for more...

DEBIAN-CVE-2022-39956

The OWASP ModSecurity Core Rule Set CRS is affected by a partial rule set bypass for HTTP multipart requests by submitting a payload that uses a character encoding scheme via the Content-Type or the deprecated Content-Transfer-Encoding multipart MIME header fields that will not be decoded and...

UBUNTU-CVE-2022-39956

The OWASP ModSecurity Core Rule Set CRS is affected by a partial rule set bypass for HTTP multipart requests by submitting a payload that uses a character encoding scheme via the Content-Type or the deprecated Content-Transfer-Encoding multipart MIME header fields that will not be decoded and...

ModSecurity 2.6.8 Bypass

SEC Consult Vulnerability Lab Security Advisory ======================================================================= title: ModSecurity multipart/invalid part ruleset bypass product: ModSecurity vulnerable version: = 2.6.8 fixed version: 2.7.0 CVE number: - impact: Depends what you use it for...