AWSLambda_FullAccess

Last Modified

Mar 12, 2026

March 12, 2026 at 09:26 PM UTC

Version

Total Versions

Created

Feb 12, 2026

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Risk

High

An unrestricted escalation path, identity administration, secret reads or the power to switch off security monitoring. Read from this policy document alone: trust policies, boundaries and SCPs in your account still decide what actually succeeds. How this is assessed

High
Can take over existing resources that run as another role
Grants every action of 3 documented escalation paths on any resource with no condition.
- lambda-003lambda:UpdateFunctionCodeunrestricted
- lambda-004lambda:UpdateFunctionCode + lambda:InvokeFunctionunrestricted
- lambda-005lambda:UpdateFunctionCode + lambda:AddPermissionunrestricted
Use with caution: List the roles attached to the functions, instances, pipelines or notebooks it can modify: the holder effectively has them too.
Medium
Can launch resources that run as a more privileged role
Grants the actions of 3 documented escalation paths, but only on named resources or under a condition. Review that scope before trusting it.
- lambda-001iam:PassRole + lambda:CreateFunction + lambda:InvokeFunctionscoped
  - iam:PassRole: condition iam:PassedToService
- lambda-002iam:PassRole + lambda:CreateFunction + lambda:CreateEventSourceMappingscoped
  - iam:PassRole: condition iam:PassedToService
- lambda-006iam:PassRole + lambda:CreateFunction + lambda:AddPermissionscoped
  - iam:PassRole: condition iam:PassedToService
Use with caution: Check which roles, users or policies fall inside the scope shown above. Within it the escalation works as documented, so keep privileged principals out of it.
Medium
Can read secrets
Reads Lambda environment variables, where credentials often live, on any resource with no condition.
lambda:GetFunctionConfiguration (via lambda:*)
Use with caution: Where the holder needs only some secrets, write your own policy scoped to their ARNs or tags, and limit decryption in the KMS key policies.
Medium
Can rewrite resource policies and sharing
Grants 6 permissions management actions across 1 service (lambda) on any resource, enough to share resources outside the account.
lambda:addlayerversionpermissionlambda:addpermissionlambda:deleteresourcepolicylambda:putresourcepolicylambda:removelayerversionpermissionlambda:removepermission
Use with caution: Turn on IAM Access Analyzer external access findings, and keep account-level guards like S3 Block Public Access enabled.
Medium
Full lambda access on every resource
Uses lambda:* with Resource "*" and no condition, so every action AWS adds to that service later is granted too.
lambda:*
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.

Policy Document

View on GitHub

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72{
  "PolicyVersion": {
    "Document": {
      "Version": "2012-10-17",
      "Statement": [
        {
          "Effect": "Allow",
          "Action": [
            "cloudformation:DescribeStacks",
            "cloudformation:ListStackResources",
            "cloudwatch:ListMetrics",
            "cloudwatch:GetMetricData",
            "ec2:DescribeSecurityGroups",
            "ec2:DescribeSubnets",
            "ec2:DescribeVpcs",
            "kms:DescribeKey",
            "kms:ListAliases",
            "iam:GetPolicy",
            "iam:GetPolicyVersion",
            "iam:GetRole",
            "iam:GetRolePolicy",
            "iam:ListAttachedRolePolicies",
            "iam:ListRolePolicies",
            "iam:ListRoles",
            "lambda:*",
            "logs:DescribeLogGroups",
            "states:DescribeStateMachine",
            "states:ListStateMachines",
            "tag:GetResources",
            "xray:GetTraceSummaries",
            "xray:BatchGetTraces"
          ],
          "Resource": "*"
        },
        {
          "Effect": "Allow",
          "Action": "iam:PassRole",
          "Resource": "*",
          "Condition": {
            "StringEquals": {
              "iam:PassedToService": "lambda.amazonaws.com"
            }
          }
        },
        {
          "Effect": "Allow",
          "Action": [
            "logs:DescribeLogStreams",
            "logs:GetLogEvents",
            "logs:FilterLogEvents",
            "logs:StartLiveTail",
            "logs:StopLiveTail"
          ],
          "Resource": "arn:aws:logs:*:*:log-group:/aws/lambda/*"
        },
        {
          "Effect": "Allow",
          "Action": "iam:CreateServiceLinkedRole",
          "Resource": "arn:aws:iam::*:role/aws-service-role/lambda.amazonaws.com/AWSServiceRoleForLambda",
          "Condition": {
            "StringEquals": {
              "iam:AWSServiceName": "lambda.amazonaws.com"
            }
          }
        }
      ]
    },
    "VersionId": "v7",
    "IsDefaultVersion": true,
    "CreateDate": "2026-02-12T18:00:51+00:00"
  }
}