A vulnerability was found in ModSecurity. This issue occurs when HTTP multipart requests are incorrectly parsed and could bypass the Web Application Firewall. NOTE: This is related to CVE-2022-39956, but can be considered independent changes to the ModSecurity (C language) codebase.

ModSecurity 3.x before 3.0.4 mishandles key-value pair parsing, as demonstrated by a "string index out of range" error and worker-process crash for a "Cookie: =abc" header.

DISPUTED ModSecurity 3.0.0 has XSS via an onerror attribute of an IMG element. NOTE: a third party has disputed this issue because it may only apply to environments without a Core Rule Set configured.

Trustwave ModSecurity 3.x before 3.0.10 has Inefficient Algorithmic Complexity.