This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-52761 →

DEBIAN-CVE-2026-52761

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:utf8to...

Original description

The description as published by the source.

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.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 modsecurity

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:13 modsecurity

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:14 modsecurity

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.16-1"}]}]

References

advisory security-tracker.debian.org