CVE•Published 2026-05-12•Modified 2026-05-14•0 articles on news•5 live references•NVD data

CVE-2026-42268Owasp · Modsecurity

Vulnerability data via NVD (ingested)

CVSS v3.1

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS percentile

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Weaknesses (CWE)

CWE-191Integer Underflow (Wrap or Wraparound)CWE-248Uncaught Exception

Description

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.

Timeline

Published 2026-05-12

Modified 2026-05-14

External references

NVD MITRE Exploit-DB Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-42268

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Owasp Modsecurity"

All exposed Owasp Modsecurity instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Modsecurity"

HTTP body or banner mentions "Modsecurity" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-42268