# CVE-2026-52761

## Summary

- **CVE ID:** CVE-2026-52761
- **Severity:** MEDIUM
- **CVSS Score:** 5.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N)
- **CWE:** CWE-467
- **Published:** Jul 10, 2026
- **Last Modified:** Jul 13, 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.

## Affected Products

- owasp-modsecurity — ModSecurity (>= 3.0.0, < 3.0.16)

## References

- [CNA](https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-qjgm-7gp4-f8qq)
- [CNA](https://github.com/owasp-modsecurity/ModSecurity/commit/edcd010814e234d46e2ec55a0f1078ff9d3032e4)
- [CNA](https://github.com/owasp-modsecurity/ModSecurity/releases/tag/v3.0.16)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.41%
- **EPSS Percentile:** 34.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._