Vulnerability in Owasp-Modsecurity Modsecurity
CVE-2026-103932
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.
Published .
CVSS v3 metric
CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Owasp-Modsecurity Modsecurity — versions >= 3.0.5, < 3.0.17
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-103932?
- CVE-2026-103932 is a medium-severity vulnerability in Owasp-Modsecurity Modsecurity, classified under CWE-253. CVSS score: 5.8/10. Published 2026-11-05.
- How severe is CVE-2026-103932?
- Medium severity. CVSS v3 base score is 5.8 out of 10.