diff --git a/CHANGELOG.md b/CHANGELOG.md
index 21e4e34..8740811 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,26 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
+## [0.27.5] - 2026-09-30
+### Security
+- OTP codes (both customer login via `UserOtpService` and staff login via
+  `OtpService`) were stored in plaintext in `users.otp_code`/`lunar_staff.otp_code`
+  and compared against the plaintext guess. The staff path was additionally
+  weaker — a loose `!=` comparison with no timing-attack protection and no
+  attempt-limiting at all. Both columns are replaced with `otp_code_hash`
+  (bcrypt, via a `'hashed'` cast — same convention `password` already uses),
+  compared with `Hash::check()`. The cache-backed pending-signup OTP path
+  (an email with no `User` row yet) is hashed the same way. No backfill —
+  any code mid-flight when this deploys is invalidated (codes expire in 10
+  minutes regardless, so the practical impact is limited to a re-request).
+- `App\Models\User`'s (3dealer) and `Modules\Core\Auth\Models\Staff`'s
+  `$hidden` arrays didn't list `otp_code`/`otp_expires_at`/`otp_attempts`/
+  `pending_email_code_hash`/etc. at all — any serialization of either model
+  (an API response, `Auth::user()` returned somewhere) would have leaked
+  those fields, including the (now-hashed, previously plaintext) OTP code
+  itself. `Staff` additionally never overrode Lunar's own base `$hidden`, so
+  it also lacked `password`/`remember_token` protection until now.
+
 ## [0.27.4] - 2026-09-29
 ### Added
 - Generic `.bbk-notice` / `.bbk-notice--info` message box and a
diff --git a/composer.json b/composer.json
index 3b28e84..c374fe5 100644
--- a/composer.json
+++ b/composer.json
@@ -2,7 +2,7 @@
   "name": "boboko/core",
   "description": "Core module — authentication and shared panel behaviour",
   "type": "library",
-  "version": "0.27.4",
+  "version": "0.27.5",
   "autoload": {
     "psr-4": {
       "Modules\\Core\\": "src/"
diff --git a/package.json b/package.json
index d939f0c..42e91c1 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@boboko/core",
-    "version": "0.27.4",
+    "version": "0.27.5",
     "private": true,
     "type": "module",
     "description": "Portable Stimulus controllers and styles for boboko-core's cart + checkout module. Installed as a real npm dependency (file:../boboko-core in dev, a tagged git install in prod) so a consuming app's `npm install` resolves this package's own dependencies (leaflet, @hotwired/stimulus) transitively, the same way `composer update boboko/*` does for PHP. See CONTRIBUTE.md's \"JS/CSS: a real npm package\" section.",