CVE-2026-42268
published 2026-05-12CVE-2026-42268: 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…
PriorityP339high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.40%
31.4th percentile
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.
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mod_security | mod_security | — | — |
| owasp-modsecurity | modsecurity | — | — |
| owasp | modsecurity | >= 3.0.0 < 3.0.15 | 3.0.15 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv4.08.2HIGHCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vendor_redhat8.2HIGH
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Bugzilla
CVE-2026-42268 mod_security: ModSecurity: Denial of Service via unsigned integer underflow in rule verification functions [epel-all]
bugzilla·2026-05-25·CVSS 8.2
CVE-2026-42268 [HIGH] CVE-2026-42268 mod_security: ModSecurity: Denial of Service via unsigned integer underflow in rule verification functions [epel-all]
CVE-2026-42268 mod_security: ModSecurity: Denial of Service via unsigned integer underflow in rule verification functions [epel-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Bugzilla
CVE-2026-42268 mod_security: ModSecurity: Denial of Service via unsigned integer underflow in rule verification functions [fedora-all]
bugzilla·2026-05-25·CVSS 8.2
CVE-2026-42268 [HIGH] CVE-2026-42268 mod_security: ModSecurity: Denial of Service via unsigned integer underflow in rule verification functions [fedora-all]
CVE-2026-42268 mod_security: ModSecurity: Denial of Service via unsigned integer underflow in rule verification functions [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Bugzilla
CVE-2026-42268 mod_security: ModSecurity: Denial of Service via unsigned integer underflow in rule verification functions
bugzilla·2026-05-12·CVSS 8.2
CVE-2026-42268 [HIGH] CVE-2026-42268 mod_security: ModSecurity: Denial of Service via unsigned integer underflow in rule verification functions
CVE-2026-42268 mod_security: ModSecurity: Denial of Service via unsigned integer underflow in rule verification functions
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.
2026-05-12
Published