diff --git a/apps/files_sharing/src/models/Share.ts b/apps/files_sharing/src/models/Share.ts
index b0638b29448..a861aabf88d 100644
--- a/apps/files_sharing/src/models/Share.ts
+++ b/apps/files_sharing/src/models/Share.ts
@@ -38,6 +38,10 @@ export default class Share {
 		}
 		ocsData.attributes = ocsData.attributes ?? []
 
+		// Pre-declared so Vue 2 makes newPassword reactive at observation time,
+		// avoiding $set's property-addition path which races with async setters.
+		ocsData.newPassword = ocsData.newPassword ?? undefined
+
 		// store state
 		this._share = ocsData
 	}
@@ -278,6 +282,18 @@ export default class Share {
 		this._share.password = password
 	}
 
+	/**
+	 * Unsaved password (set during share creation or editing).
+	 * Delegates to _share so reads/writes go through the reactive state.
+	 */
+	get newPassword(): string | undefined {
+		return this._share.newPassword
+	}
+
+	set newPassword(value: string | undefined) {
+		this._share.newPassword = value
+	}
+
 	/**
 	 * Password expiration time
 	 * @return {string} date with YYYY-MM-DD format