CVE-2026-52761

mediumCVSS 5.8covered by 1 sourcefirst seen 2026-07-10

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.

⚡ Watch CVE-2026-52761

Get an email if CVE-2026-52761 is added to CISA KEV, gains public exploit code, or a new advisory cites it — max one per day, one-click unsubscribe.

Advisory coverage (1)

mediumCVE-2026-52761: ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache…nvd · 2026-07-10

External references

NVD record for CVE-2026-52761

CVE.org record

Embed the live status

— this badge updates automatically when the KEV or exploit status changes. How to embed it →

[![CVE-2026-52761 status](https://www.csirts.com/badge/CVE-2026-52761)](https://www.csirts.com/cve/CVE-2026-52761)