Debian: modsecurity-crs Critical Fix for CVE-2026-21876 DSA-6105-1
debian
January 21, 2026
It was discovered that one of the rules in the OWASP ModSecurity Core Rule Set parsed some multipart requests incorrectly
Topics Covered
Summary
For the oldstable distribution (bookworm), this problem has been fixed
in version 3.3.4-1+deb12u1.
For the stable distribution (trixie), this problem has been fixed in
version 3.3.7-1+deb13u1.
We recommend that you upgrade your modsecurity-crs packages.
For the detailed security status of modsecurity-crs please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/modsecurity-crs
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
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Package: modsecurity-crs
CVE ID: CVE-2026-21876
Topics Covered
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