{"id":"DEBIAN-CVE-2026-52761","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.","modified":"2026-09-29T13:04:09.508067567Z","published":"2026-07-10T22:16:42.833Z","upstream":["CVE-2026-52761"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-52761"}],"affected":[{"package":{"name":"modsecurity","ecosystem":"Debian:12","purl":"pkg:deb/debian/modsecurity?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.10-1","3.0.11-1","3.0.12-1","3.0.12-1.1","3.0.12-1.1~exp1","3.0.13-1","3.0.14-1","3.0.15-1","3.0.16-1","3.0.9-1","3.0.9-1+deb12u1","3.0.9-1+deb12u2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-52761.json"}},{"package":{"name":"modsecurity","ecosystem":"Debian:13","purl":"pkg:deb/debian/modsecurity?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.14-1","3.0.14-1+deb13u1","3.0.15-1","3.0.16-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-52761.json"}},{"package":{"name":"modsecurity","ecosystem":"Debian:14","purl":"pkg:deb/debian/modsecurity?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.16-1"}]}],"versions":["3.0.14-1","3.0.15-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-52761.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"}]}