<PAGE>

                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 8-K
                                 CURRENT REPORT

                     PURSUANT TO SECTION 13 OR 15(d) OF THE
                       SECURITIES AND EXCHANGE ACT OF 1934

                Date of Report (Date of earliest event reported)
                                October 30, 2006

                                 2006-CB8 Trust
                                (Issuing Entity)

                     Merrill Lynch Mortgage Investors, Inc.
              (Exact Name of Depositor as Specified in its Charter)

               Credit-Based Asset Servicing and Securitization LLC
               (Exact Name of Sponsor as Specified in its Charter)

                     Merrill Lynch Mortgage Investors, Inc.
             (Exact Name of Registrant as Specified in its Charter)

            Delaware                     333-130545              13-3416059
  (State or Other Jurisdiction           (Commission          (I.R.S. Employer
       Of Incorporation)                File Number)         Identification No.)

            250 Vesey Street
    4 World Financial Center
           10th Floor
              New York, NY                                          10080
(Address of Principal Executive                                   (Zip Code)
               Offices)

        Registrant's telephone, including area code: (212) 449-0357

                                    No Change
          (Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

[_]  Written communications pursuant to Rule 425 under the Securities Act (17
     CFR 230.425)

[_]  Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
     240.14a-12)

[_]  Pre-commencement communications pursuant to Rule 14d-2(b) under the
     Exchange Act (17 CFR 240.14d-2(b))

[_]  Pre-commencement communications pursuant to Rule 13e-4(c) under the
     Exchange Act (17 CFR 240.13e-4(c))

<PAGE>

ITEM 8.01 Other Events.

     The Registrant registered issuances of C-BASS Mortgage Loan Asset-Backed
Certificates Series 2006-CB8 on a delayed or continuous basis pursuant to Rule
415 under the Securities Act of 1933, as amended (the "Act"), by a Registration
Statement on Form S-3 (Registration File No. 333-130545 (the "Registration
Statement"). Pursuant to the Registration Statement, the Registrant issued
$517,954,000 in aggregate principal amount, in connection with Certificates
designated as: the Class A-1, Class A-2A, Class A-2B, Class A-2C, Class A-2D,
Class M-1, Class M-2, Class M-3, Class M-4, Class M-5, Class M-6, Class M-7 and
Class M-8 Certificates, each issued on October 30, 2006.

     This Current Report on Form 8-K is being filed to satisfy an undertaking,
contained in the definitive Prospectus, dated September 8, 2006, as supplemented
by the Prospectus Supplement, dated October 26, 2006 (collectively, the
"Prospectus Supplement"), to file a copy of the Pooling and Servicing Agreement
(as defined below) executed in connection with the issuance of the Certificates,
a form of which was filed as an exhibit to the Registration Statement.

     The Certificates (as defined below) were issued pursuant to a Pooling and
Servicing Agreement, attached hereto as Exhibit 4.1, dated as of October 1,
2006, among Merrill Lynch Mortgage Investors, Inc., as depositor (the
"Depositor"), Credit-Based Asset Servicing and Securitization LLC, as sponsor
(the "Sponsor"), Litton Loan Servicing LP, as servicer (the "Servicer") and U.S.
Bank National Association, as trustee (the "Trustee"). The "Certificates"
consist of the following classes: Class A-1, Class A-2A, Class A-2B, Class A-2C,
Class A-2D, Class M-1, Class M-2, Class M-3, Class M-4, Class M-5, Class M-6,
Class M-7 and Class M-8, the Class B-1, Class B-2, Class B-3, Class P, Class
CE-1, Class CE-2, Class R and Class R-X. The Certificates evidence all the
beneficial ownership interest in a trust fund (the "Trust Fund") that consists
primarily of a pool of certain fixed and adjustable rate, first and second lien
residential mortgage loans (the "Mortgage Loans") with an aggregate outstanding
principal balance of approximately $571,697,969.78 as of October 1, 2006.
Capitalized terms used herein and not otherwise defined shall have the meanings
assigned to them in the Pooling and Servicing Agreement.

<PAGE>

ITEM 9.01. Financial Statements and Exhibits.

          (a)  Not applicable.

          (b)  Not applicable.

          (c)  Not applicable.

          (d)  Exhibits:

               4.1  Pooling and Servicing Agreement, dated as of October 1,
                    2006, among the Depositor, the Trustee, the Sponsor and the
                    Servicer.

               99.1 Mortgage Loan Purchase Agreement, dated as of October 1,
                    2006, between the Sponsor, as seller, and the Depositor, as
                    purchaser.

<PAGE>

                                   SIGNATURES

     Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                         MERRILL LYNCH MORTGAGE INVESTORS, INC.


                                         By: /s/ Paul Park
                                             -----------------------------------
                                         Name: Paul Park
                                         Title: Authorized Signatory

Date: November 14, 2006

<PAGE>

                                  EXHIBIT INDEX

Exhibit No.                         Description                         Page No.
-----------                         -----------                         --------
        4.1   Pooling and Servicing Agreement, dated as of October 1,
              2006, among the Depositor, the Trustee, the Sponsor and
              the Servicer.

       99.1   Mortgage Loan Purchase Agreement, dated as of October
              1, 2006, between the Sponsor, as seller, and the
              Depositor, as purchaser.
[{"type": "8-K", "sequence": "1", "filename": "b415717_8k.txt", "description": "FORM 8-K", "secsgml_size_bytes": 6427}]
{"company-data": {"conformed-name": "C-BASS Mortgage Loan Asset-Backed Certificates, Series 2006-CB8", "cik": "0001378276", "assigned-sic": "6189", "state-of-incorporation": "DE", "fiscal-year-end": "1228"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "333-130545-32", "film-number": "061216838"}, "business-address": {"street1": "4LD FINANCIAL CENTER FLOOR 10", "city": "NEW YORK", "state": "NY", "zip": "10281-1310", "phone": "2124491000"}, "mail-address": {"street1": "WORLD FINANCIAL CTR N TOWER", "street2": "250 VESEY ST 10TH FL", "city": "NEW YORK", "state": "NY", "zip": "10281-1310"}}
UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 8-K
                                 CURRENT REPORT

                     PURSUANT TO SECTION 13 OR 15(d) OF THE
                       SECURITIES AND EXCHANGE ACT OF 1934

                Date of Report (Date of earliest event reported)
                                October 30, 2006

                                 2006-CB8 Trust
                                (Issuing Entity)

                     Merrill Lynch Mortgage Investors, Inc.
              (Exact Name of Depositor as Specified in its Charter)

               Credit-Based Asset Servicing and Securitization LLC
               (Exact Name of Sponsor as Specified in its Charter)

                     Merrill Lynch Mortgage Investors, Inc.
             (Exact Name of Registrant as Specified in its Charter)

            Delaware                     333-130545              13-3416059
  (State or Other Jurisdiction           (Commission          (I.R.S. Employer
       Of Incorporation)                File Number)         Identification No.)

            250 Vesey Street
    4 World Financial Center
           10th Floor
              New York, NY                                          10080
(Address of Principal Executive                                   (Zip Code)
               Offices)

        Registrant's telephone, including area code: (212) 449-0357

                                    No Change
          (Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

[_]  Written communications pursuant to Rule 425 under the Securities Act (17
     CFR 230.425)

[_]  Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
     240.14a-12)

[_]  Pre-commencement communications pursuant to Rule 14d-2(b) under the
     Exchange Act (17 CFR 240.14d-2(b))

[_]  Pre-commencement communications pursuant to Rule 13e-4(c) under the
     Exchange Act (17 CFR 240.13e-4(c))
ITEM 8.01 Other Events.

     The Registrant registered issuances of C-BASS Mortgage Loan Asset-Backed
Certificates Series 2006-CB8 on a delayed or continuous basis pursuant to Rule
415 under the Securities Act of 1933, as amended (the "Act"), by a Registration
Statement on Form S-3 (Registration File No. 333-130545 (the "Registration
Statement"). Pursuant to the Registration Statement, the Registrant issued
$517,954,000 in aggregate principal amount, in connection with Certificates
designated as: the Class A-1, Class A-2A, Class A-2B, Class A-2C, Class A-2D,
Class M-1, Class M-2, Class M-3, Class M-4, Class M-5, Class M-6, Class M-7 and
Class M-8 Certificates, each issued on October 30, 2006.

     This Current Report on Form 8-K is being filed to satisfy an undertaking,
contained in the definitive Prospectus, dated September 8, 2006, as supplemented
by the Prospectus Supplement, dated October 26, 2006 (collectively, the
"Prospectus Supplement"), to file a copy of the Pooling and Servicing Agreement
(as defined below) executed in connection with the issuance of the Certificates,
a form of which was filed as an exhibit to the Registration Statement.

     The Certificates (as defined below) were issued pursuant to a Pooling and
Servicing Agreement, attached hereto as Exhibit 4.1, dated as of October 1,
2006, among Merrill Lynch Mortgage Investors, Inc., as depositor (the
"Depositor"), Credit-Based Asset Servicing and Securitization LLC, as sponsor
(the "Sponsor"), Litton Loan Servicing LP, as servicer (the "Servicer") and U.S.
Bank National Association, as trustee (the "Trustee"). The "Certificates"
consist of the following classes: Class A-1, Class A-2A, Class A-2B, Class A-2C,
Class A-2D, Class M-1, Class M-2, Class M-3, Class M-4, Class M-5, Class M-6,
Class M-7 and Class M-8, the Class B-1, Class B-2, Class B-3, Class P, Class
CE-1, Class CE-2, Class R and Class R-X. The Certificates evidence all the
beneficial ownership interest in a trust fund (the "Trust Fund") that consists
primarily of a pool of certain fixed and adjustable rate, first and second lien
residential mortgage loans (the "Mortgage Loans") with an aggregate outstanding
principal balance of approximately $571,697,969.78 as of October 1, 2006.
Capitalized terms used herein and not otherwise defined shall have the meanings
assigned to them in the Pooling and Servicing Agreement.
ITEM 9.01. Financial Statements and Exhibits.

          (a)  Not applicable.

          (b)  Not applicable.

          (c)  Not applicable.

          (d)  Exhibits:

               4.1  Pooling and Servicing Agreement, dated as of October 1,
                    2006, among the Depositor, the Trustee, the Sponsor and the
                    Servicer.

               99.1 Mortgage Loan Purchase Agreement, dated as of October 1,
                    2006, between the Sponsor, as seller, and the Depositor, as
                    purchaser.
SIGNATURES

     Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                         MERRILL LYNCH MORTGAGE INVESTORS, INC.

                                         By: /s/ Paul Park
                                             -----------------------------------
                                         Name: Paul Park
                                         Title: Authorized Signatory

Date: November 14, 2006
EXHIBIT INDEX

Exhibit No.                         Description                         Page No.
-----------                         -----------                         --------
        4.1   Pooling and Servicing Agreement, dated as of October 1,
              2006, among the Depositor, the Trustee, the Sponsor and
              the Servicer.

       99.1   Mortgage Loan Purchase Agreement, dated as of October
              1, 2006, between the Sponsor, as seller, and the
              Depositor, as purchaser.