Vulnerability intelligence

CVE-2026-52761

ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. From 3.0.0 through 3.0.15, the t:utf8toUnicode transformation in src/actions/transformations/utf8_to_unicode.cc produces wrong output on i386 architecture because snprintf uses sizeof on a char pointer rather than the length of the unicode buffer, allowing rules that use this transformation to be bypassed on i386 architecture. This issue is fixed in version 3.0.16.

CVSS Score

—

Medium

EPSS — Exploit Probability

0.4%

Riskier than 35% of all CVEs

Exploitation

Not in CISA KEV

No federal exploitation record

Remediation

unknown

Check vendor advisories

NVD entry

1 article across 1 outlet · first covered Jul 6, 2026 · latest Jul 6, 2026

Coverage timeline

ModSecurity patches WAF bypass flaws in version 3.0.16
securityonline.info · Jul 6, 2026