PT-2026-36538 · Unknown · Modsecurity

Fumfel · Published 2026-05-01 · Updated 2026-05-14 · CVE-2026-42268

Positive Technologies (AI Summary)

CVSS v4.0

8.2

High

Base vector

AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions ModSecurity versions 3.0.0 through 3.0.14

Description An unhandled exception (std::out of range) occurs in libmodsecurity3 due to an unsigned integer underflow. This issue is triggered when an administrator utilizes any of the following rules: @verifySSN, @verifyCPF, or @verifySVNR.

Recommendations Update to version 3.0.15. As a temporary workaround, avoid using the rules @verifySSN, @verifyCPF, and @verifySVNR until the update is applied.

Exploit

Fix

Integer Underflow

Weakness Enumeration

CWE-248

CWE-191

Related Identifiers

BIT-MODSECURITY-2026-42268

BIT-MODSECURITY2-2026-42268

CVE-2026-42268

OPENSUSE-SU-2026:10732-1

Affected Products

Modsecurity

References · 15

• 🔥 https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-vwr3-7x7g-7p9w · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-42268 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-42268 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10732-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-42268 · Security Note
• https://osv.dev/vulnerability/BIT-modsecurity2-2026-42268 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-42268 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-modsecurity-2026-42268 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-42268 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-42268 · Vendor Advisory
• https://suse.com/security/cve/CVE-2026-30923 · Note
• https://twitter.com/Huntio/status/2050259009505050648 · Twitter Post
• https://suse.com/security/cve/CVE-2026-42268 · Note
• https://t.me/cveNotify/163442 · Telegram Post
• https://twitter.com/CVEnew/status/2054323973123625058 · Twitter Post