Transit gateway must not auto-accept shared attachments
High
AWS
General
aws-ec2-transitgateway-transit-gateway-auto-accept
Applies to
AWS::EC2::TransitGateway
What CGPulse checks
A resource passes this rule when autoAcceptSharedAttachments must equal disable. Anything else is reported as a finding with the evaluated property value attached as evidence.
How to fix it
Disable auto-accept for shared attachments to require manual approval and prevent unauthorized connections. In AWS Console: VPC > Transit gateways > modify > disable Auto accept shared attachments. See: https://docs.aws.amazon.com/vpc/latest/tgw/tgw-transit-gateways.html
Terraform
resource "aws_ec2_transit_gateway" "{name}" {
auto_accept_shared_attachments = "disable"
}
Compliance frameworks
Is your environment compliant with this rule?
CGPulse checks it — and 621 others — against your Azure and AWS accounts with read-only access.
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