Is CVE-2026-42268 actively exploited?

No active exploitation of CVE-2026-42268 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-42268 be exploited remotely?

Yes. CVE-2026-42268 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-42268?

CVE-2026-42268 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2026-42268

HIGH

CVE-2026-42268

CWE-191Published: May 12, 2026· Updated: May 14, 2026

7.5

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:12.9th

Official 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.

NVD Source

Technical Analysis

CVE-2026-42268 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.