modsecurity: ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx
CVE-2026-42268 is fixed in modsecurity on 1 platform, first by DEBIAN-CVE-2026-42268, released May 15, 2026. It is not reported as exploited. Patch Radar priority: High.
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::out_of_range) caused by unsigned integer underflow in libmodsecurity3 if the user (administrator) uses a rule any of @verifySSN, @verifyCPF, or @verifySVNR. This vulnerability is fixed in 3.0.15.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| modsecurity · Debian 12.15 (bookworm) | 3.0.9-1+deb12u2 | DEBIAN-CVE-2026-42268 | May 15, 2026 |
| modsecurity · Debian 13.5 (trixie) | 3.0.14-1+deb13u1 | DEBIAN-CVE-2026-42268 | May 15, 2026 |
| modsecurity · Debian 14 | 3.0.15-1 | DEBIAN-CVE-2026-42268 | May 15, 2026 |
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