What is CVE-2026-30923?

CVE-2026-30923 is a high-severity vulnerability in Owasp Modsecurity, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2026-05-05.

How severe is CVE-2026-30923?

High severity. CVSS v3 base score is 7.5 out of 10.

Out-of-bounds Read in Owasp Modsecurity

CVE-2026-30923

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 tra…

Vulnerability class: Buffer Overflow

EPSS: 0.001 (16.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Owasp Modsecurity
Owasp-modsecurity Modsecurity — versions < 3.0.15

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-qrjc-3jpc-3h2g (x_refsource_CONFIRM, Exploit, Vendor Advisory)
https://github.com/owasp-modsecurity/ModSecurity/releases/tag/v3.0.15 (Product, Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2026-30923?: CVE-2026-30923 is a high-severity vulnerability in Owasp Modsecurity, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2026-05-05.
How severe is CVE-2026-30923?: High severity. CVSS v3 base score is 7.5 out of 10.