aws-cdk: (aws-secretsmanager): grant read fails when secret is fetched using fromSecretNamev2

What is the problem?

I have manually created a secret named “SECRET-NAME” in SecretsManager and need to request it in one of my stacks, I’m doing it like so:

secret = SMSecret.from_secret_name_v2(
            self, "Secret", "SECRET-NAME"
        )

When I grant read access to a role like so:

secret.grant_read(role)

It generates the wrong access:

            [ ] {
            [ ]   "Action": [
            [+]     "secretsmanager:GetSecretValue",
            [+]     "secretsmanager:DescribeSecret"
            [+]   ],
            [+]   "Effect": "Allow",
            [+]   "Resource": {
            [+]     "Fn::Join": [
            [+]       "",
            [+]       [
            [+]         "arn:",
            [+]         {
            [+]           "Ref": "AWS::Partition"
            [+]         },
            [+]         ":secretsmanager:eu-central-1:726654634199:secret:SECRET-NAME-??????"
            [+]       ]
            [+]     ]
            [+]   }
            [+] },

Reproduction Steps

Create a manual secret without the secretsmanager added suffix and request it from within your code.

What did you expect to happen?

I would have expected my role to have read access to the role

What actually happened?

A non-existing ARN was used as the secret ARN in the policy

CDK CLI Version

2.0.0-rc.33

Framework Version

No response

Node.js Version

14.16.0

OS

Arch Linux

Language

Python

Language Version

Python 3.9.9

Other information

No response