CVE-2026-103932 - ModSecurity: PCRE2 `@rxGlobal` match-limit errors are converted to no-match

[Starburst-David]

CVE ID :CVE-2026-103932
Published : Nov. 5, 2026
Description :ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. From 3.0.5 until 3.0.17, the PCRE2 implementation of @rxGlobal in src/utils/regex.cc converts pcre2_match match-limit errors into an ordinary no-match result instead of propagating a non-OK RegexResult. When attacker-controlled input exhausts SecPcreMatchLimit, rules that rely on MSC_PCRE_LIMITS_EXCEEDED or its TX compatibility indicator do not run, so a request that should be rejected can pass through the WAF. The issue affects PCRE2 deployments that use @rxGlobal with a limit-exhaustible expression and a compensating rule; it is not a universal WAF bypass. This issue is fixed in version 3.0.17.
Severity:5.8

More Information:
https://cvefeed.io/vuln/detail/CVE-2026-103932