CVE-2026-52761
ModSecurity: Transformation utf8toUnicode produces wrong output on i386 architecture
- State
- Published
- Severity
- 5.8 Medium
- Published
- Jul 10, 2026
- Updated
- Jul 13, 2026
- Reserved
- Jun 8, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.8 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N | GitHub_M |
Weaknesses
- CWE-467 Use of sizeof() on a Pointer Type
Affected Products
| Product | Versions |
|---|---|
ModSecurityowasp-modsecurity |
|
References
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