MultiPartyApprovalFullAccess

Last Modified

Mar 12, 2026

March 12, 2026 at 09:28 PM UTC

Version

Total Versions

Created

Feb 12, 2026

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Risk

Medium

The same capabilities in a scoped form, resource policy writes, reads across all data, or full access to a whole service. Read from this policy document alone: trust policies, boundaries and SCPs in your account still decide what actually succeeds. How this is assessed

Medium
Can rewrite resource policies and sharing
Grants 2 permissions management actions across 1 service (mpa) on any resource, enough to share resources outside the account.
mpa:deleteresourcepolicympa:putresourcepolicy
Use with caution: Turn on IAM Access Analyzer external access findings, and keep account-level guards like S3 Block Public Access enabled.
Medium
Full mpa access on every resource
Uses mpa:* with Resource "*" and no condition, so every action AWS adds to that service later is granted too.
mpa:*
Use with caution: The grant grows every time the service does. For long-lived access, prefer a policy that lists the actions you actually need.

IAM Access Analyzer (2)

Warning / TYPE_MISMATCH
Use the operator type String instead of operator ARN for the condition key kms:EncryptionContext:aws:sso:instance-arn. AWS docs
Warning / TYPE_MISMATCH
Use the operator type String instead of operator ARN for the condition key kms:EncryptionContext:aws:identitystore:identitystore-arn. AWS docs

Policy Document

View on GitHub

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103{
  "PolicyVersion": {
    "Document": {
      "Version": "2012-10-17",
      "Statement": [
        {
          "Sid": "MpaFullAccess",
          "Effect": "Allow",
          "Action": [
            "mpa:*"
          ],
          "Resource": "*"
        },
        {
          "Sid": "OrganizationsAccess",
          "Effect": "Allow",
          "Action": [
            "organizations:ListDelegatedAdministrators",
            "organizations:DescribeOrganization"
          ],
          "Resource": "*"
        },
        {
          "Sid": "SSOCreateApplication",
          "Effect": "Allow",
          "Action": [
            "sso:CreateApplication"
          ],
          "Resource": [
            "arn:aws:sso:::instance/*",
            "arn:aws:sso::aws:applicationProvider/mpa"
          ]
        },
        {
          "Sid": "SSOApplicationManagement",
          "Effect": "Allow",
          "Action": [
            "sso:DescribeApplication",
            "sso:PutApplicationAssignmentConfiguration",
            "sso:PutApplicationGrant",
            "sso:PutApplicationAuthenticationMethod",
            "sso:PutApplicationAccessScope",
            "sso:DeleteApplication"
          ],
          "Resource": "*",
          "Condition": {
            "StringEqualsIfExists": {
              "aws:CalledViaLast": "mpa.amazonaws.com"
            }
          }
        },
        {
          "Sid": "SSOManagementAccess",
          "Effect": "Allow",
          "Action": [
            "sso:DescribeInstance",
            "sso:DescribeRegisteredRegions",
            "sso:GetSharedSsoConfiguration",
            "sso-directory:DescribeUsers",
            "sso-directory:SearchUsers",
            "sso:ListInstances"
          ],
          "Resource": "*"
        },
        {
          "Sid": "AllowKmsAccessViaIdentityCenter",
          "Effect": "Allow",
          "Action": [
            "kms:Decrypt"
          ],
          "Resource": "*",
          "Condition": {
            "ArnLike": {
              "kms:EncryptionContext:aws:sso:instance-arn": "arn:*:sso:::instance/*"
            },
            "StringLike": {
              "kms:ViaService": "sso.*.amazonaws.com"
            }
          }
        },
        {
          "Sid": "AllowKmsAccessViaIdentityStore",
          "Effect": "Allow",
          "Action": [
            "kms:Decrypt"
          ],
          "Resource": "*",
          "Condition": {
            "ArnLike": {
              "kms:EncryptionContext:aws:identitystore:identitystore-arn": "arn:*:identitystore::*:identitystore/*"
            },
            "StringLike": {
              "kms:ViaService": "identitystore.*.amazonaws.com"
            }
          }
        }
      ]
    },
    "VersionId": "v6",
    "IsDefaultVersion": true,
    "CreateDate": "2026-02-12T18:02:56+00:00"
  }
}