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CVE-2026-52761

5.3 medium SSVC exploitation: none Analyzed
NVD · CVE.org

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.

Fix

Patch, vendor advisory and mitigation references on NVD 2

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 5.3 · owaspNVD modified 2026-10-25 15:10

Affected (CPE criteria) 1

  • cpe:2.3:a:owasp:modsecurity:*:*:*:*:*:*:*:*

References 3