{"id":"BIT-modsecurity-2026-52761","summary":"ModSecurity: Transformation utf8toUnicode produces wrong output on i386 architecture","details":"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.","aliases":["BIT-modsecurity2-2026-52761","CVE-2026-52761","GHSA-qjgm-7gp4-f8qq"],"modified":"2026-09-08T08:46:34.665251102Z","published":"2026-07-15T08:51:31.071Z","database_specific":{"cpes":["cpe:2.3:a:trustwave:modsecurity:*:*:*:*:*:*:*:*"],"severity":"Medium"},"references":[{"type":"FIX","url":"https://github.com/owasp-modsecurity/ModSecurity/commit/edcd010814e234d46e2ec55a0f1078ff9d3032e4"},{"type":"ARTICLE","url":"https://github.com/owasp-modsecurity/ModSecurity/releases/tag/v3.0.16"},{"type":"ADVISORY","url":"https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-qjgm-7gp4-f8qq"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-52761"}],"affected":[{"package":{"name":"modsecurity","ecosystem":"Bitnami","purl":"pkg:bitnami/modsecurity"},"ranges":[{"type":"SEMVER","events":[{"introduced":"3.0.0"},{"fixed":"3.0.16"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/modsecurity/BIT-modsecurity-2026-52761.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"}]}],"schema_version":"1.9.0"}