Craft CMS: Passkey login accepts replayed WebAuthn assertions

Date Aug 7, 2026
Type Vendor advisory
Signal Critical vendor advisory
Vendor / Product Composer · craftcms/cms
Critical vendor advisory

Summary

Craft CMS: Passkey login accepts replayed WebAuthn assertions

Why it matters

GitHub has published a reviewed security advisory for craftcms/cms. Prioritize it with other application dependency updates.

Operator check

Check whether craftcms/cms is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. CVSS score: 9.1.

Sources

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.