Is CVE-2026-30923 actively exploited?

No active exploitation of CVE-2026-30923 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-30923 be exploited remotely?

Yes. CVE-2026-30923 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-30923?

CVE-2026-30923 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2026-30923

HIGH

CVE-2026-30923

CWE-125Published: May 5, 2026· Updated: May 7, 2026

7.5

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:12.5th

Official Description

ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. Libmodsecurity is one component of the ModSecurity v3 project. A segmentation fault occurs when a rule using the t:hexDecode transformation inspects a query string parameter containing a single character. An attacker can exploit this to crash worker processes, causing a denial of service. Service resumes once the attack stops as worker processes recover from the segfault. All versions before 3.0.15 of libModSecurity3 are affected. This has been patched in version 3.0.15.

NVD Source

Technical Analysis

CVE-2026-30923 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.