[BUG] Claude Code v1.0.27 with AWS Bedrock gives "API Error: 403 The security token included in the request is invalid."

Environment

• Platform (select one):
• [ ] Anthropic API
• [x] AWS Bedrock
• [ ] Google Vertex AI
• [ ] Other: <!-- specify -->
• Claude CLI version:

% claude update
Current version: 1.0.27
Checking for updates...
Claude Code is up to date (1.0.27)

• Operating System: macOS 15.3.2
• Terminal: Terminal App

Bug Description

I've followed https://docs.anthropic.com/en/docs/claude-code/amazon-bedrock and have setup claude to use aws bedrock. It suddenly started failing with API Error: 403 The security token included in the request is invalid..

I've the following environment variable set,

export CLAUDE_CODE_USE_BEDROCK=1
export DISABLE_PROMPT_CACHING=1
# Using inference profile ID
export ANTHROPIC_MODEL='us.anthropic.claude-3-7-sonnet-20250219-v1:0'
export ANTHROPIC_SMALL_FAST_MODEL='us.anthropic.claude-3-5-haiku-20241022-v1:0'
export AWS_REGION='us-east-1'

My AWS IAM user has the following permissions,

<img width="1068" alt="Image" src="https://github.com/user-attachments/assets/5260f2d4-895b-4d11-b834-e2ff0958f27d" />

<details>
<summary>Policy JSONs expand/collapse</summary>

MarketplaceBedrockPolicy:
{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "MarketplaceBedrock",
            "Effect": "Allow",
            "Action": [
                "aws-marketplace:ViewSubscriptions",
                "aws-marketplace:Unsubscribe",
                "aws-marketplace:Subscribe"
            ],
            "Resource": "*"
        }
    ]
}

AmazonBedrockFullAccess:
{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "BedrockAll",
            "Effect": "Allow",
            "Action": [
                "bedrock:*"
            ],
            "Resource": "*"
        },
        {
            "Sid": "DescribeKey",
            "Effect": "Allow",
            "Action": [
                "kms:DescribeKey"
            ],
            "Resource": "arn:*:kms:*:::*"
        },
        {
            "Sid": "APIsWithAllResourceAccess",
            "Effect": "Allow",
            "Action": [
                "iam:ListRoles",
                "ec2:DescribeVpcs",
                "ec2:DescribeSubnets",
                "ec2:DescribeSecurityGroups"
            ],
            "Resource": "*"
        },
        {
            "Sid": "MarketplaceModelEndpointMutatingAPIs",
            "Effect": "Allow",
            "Action": [
                "sagemaker:CreateEndpoint",
                "sagemaker:CreateEndpointConfig",
                "sagemaker:CreateModel",
                "sagemaker:DeleteEndpoint",
                "sagemaker:UpdateEndpoint"
            ],
            "Resource": [
                "arn:aws:sagemaker:*:*:endpoint/*",
                "arn:aws:sagemaker:*:*:endpoint-config/*",
                "arn:aws:sagemaker:*:*:model/*"
            ],
            "Condition": {
                "StringEquals": {
                    "aws:CalledViaLast": "bedrock.amazonaws.com",
                    "aws:ResourceTag/sagemaker-sdk:bedrock": "compatible"
                }
            }
        },
        {
            "Sid": "MarketplaceModelEndpointAddTagsOperations",
            "Effect": "Allow",
            "Action": [
                "sagemaker:AddTags"
            ],
            "Resource": [
                "arn:aws:sagemaker:*:*:endpoint/*",
                "arn:aws:sagemaker:*:*:endpoint-config/*",
                "arn:aws:sagemaker:*:*:model/*"
            ],
            "Condition": {
                "ForAllValues:StringEquals": {
                    "aws:TagKeys": [
                        "sagemaker-sdk:bedrock",
                        "bedrock:marketplace-registration-status",
                        "sagemaker-studio:hub-content-arn"
                    ]
                },
                "StringLike": {
                    "aws:RequestTag/sagemaker-sdk:bedrock": "compatible",
                    "aws:RequestTag/bedrock:marketplace-registration-status": "registered",
                    "aws:RequestTag/sagemaker-studio:hub-content-arn": "arn:aws:sagemaker:*:aws:hub-content/SageMakerPublicHub/Model/*"
                }
            }
        },
        {
            "Sid": "MarketplaceModelEndpointDeleteTagsOperations",
            "Effect": "Allow",
            "Action": [
                "sagemaker:DeleteTags"
            ],
            "Resource": [
                "arn:aws:sagemaker:*:*:endpoint/*",
                "arn:aws:sagemaker:*:*:endpoint-config/*",
                "arn:aws:sagemaker:*:*:model/*"
            ],
            "Condition": {
                "ForAllValues:StringEquals": {
                    "aws:TagKeys": [
                        "sagemaker-sdk:bedrock",
                        "bedrock:marketplace-registration-status",
                        "sagemaker-studio:hub-content-arn"
                    ]
                },
                "StringLike": {
                    "aws:ResourceTag/sagemaker-sdk:bedrock": "compatible",
                    "aws:ResourceTag/bedrock:marketplace-registration-status": "registered",
                    "aws:ResourceTag/sagemaker-studio:hub-content-arn": "arn:aws:sagemaker:*:aws:hub-content/SageMakerPublicHub/Model/*"
                }
            }
        },
        {
            "Sid": "MarketplaceModelEndpointNonMutatingAPIs",
            "Effect": "Allow",
            "Action": [
                "sagemaker:DescribeEndpoint",
                "sagemaker:DescribeEndpointConfig",
                "sagemaker:DescribeModel",
                "sagemaker:ListTags"
            ],
            "Resource": [
                "arn:aws:sagemaker:*:*:endpoint/*",
                "arn:aws:sagemaker:*:*:endpoint-config/*",
                "arn:aws:sagemaker:*:*:model/*"
            ],
            "Condition": {
                "StringEquals": {
                    "aws:CalledViaLast": "bedrock.amazonaws.com"
                }
            }
        },
        {
            "Sid": "MarketplaceModelEndpointInvokingOperations",
            "Effect": "Allow",
            "Action": [
                "sagemaker:InvokeEndpoint",
                "sagemaker:InvokeEndpointWithResponseStream"
            ],
            "Resource": [
                "arn:aws:sagemaker:*:*:endpoint/*"
            ],
            "Condition": {
                "StringEquals": {
                    "aws:CalledViaLast": "bedrock.amazonaws.com",
                    "aws:ResourceTag/sagemaker-sdk:bedrock": "compatible"
                }
            }
        },
        {
            "Sid": "DiscoveringMarketplaceModel",
            "Effect": "Allow",
            "Action": [
                "sagemaker:DescribeHubContent"
            ],
            "Resource": [
                "arn:aws:sagemaker:*:aws:hub-content/SageMakerPublicHub/Model/*",
                "arn:aws:sagemaker:*:aws:hub/SageMakerPublicHub"
            ]
        },
        {
            "Sid": "AllowMarketplaceModelsListing",
            "Effect": "Allow",
            "Action": [
                "sagemaker:ListHubContents"
            ],
            "Resource": "arn:aws:sagemaker:*:aws:hub/SageMakerPublicHub"
        },
        {
            "Sid": "PassRoleToSageMaker",
            "Effect": "Allow",
            "Action": [
                "iam:PassRole"
            ],
            "Resource": [
                "arn:aws:iam::*:role/*SageMaker*ForBedrock*"
            ],
            "Condition": {
                "StringEquals": {
                    "iam:PassedToService": [
                        "sagemaker.amazonaws.com",
                        "bedrock.amazonaws.com"
                    ]
                }
            }
        },
        {
            "Sid": "PassRoleToBedrock",
            "Effect": "Allow",
            "Action": [
                "iam:PassRole"
            ],
            "Resource": "arn:aws:iam::*:role/*AmazonBedrock*",
            "Condition": {
                "StringEquals": {
                    "iam:PassedToService": [
                        "bedrock.amazonaws.com"
                    ]
                }
            }
        }
    ]
}

</details>

Steps to Reproduce

1. See above

Expected Behavior

Claude code just works fine!

Actual Behavior

% claude
╭────────────────────────────────────────────────────────────────────────────╮
│ ✻ Welcome to Claude Code!                                                  │
│                                                                            │
│   /help for help, /status for your current setup                           │
│                                                                            │
│   cwd: /Users/first.last/Documents/Data/03_coderepos/my-project  │
│                                                                            │
│   ──────────────────────────────────────────────────────────────────────── │
│                                                                            │
│   Overrides (via env):                                                     │
│                                                                            │
│   • Prompt caching: off                                                    │
╰────────────────────────────────────────────────────────────────────────────╯


 ※ Tip: Press Esc twice to edit your previous messages

> given the report '/Users/first.last/Downloads/report_3163462.pdf', make the appropriate fixes in the project to help avoid this vulnerabilities
  ⎿  API Error: 403 The security token included in the request is invalid.

> /exit 
  ⎿  (no content)

╭────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╮
│ >                                                                                                                                                                                                      │
╰────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯
  ? for shortcuts



Total cost:            $0.0000
Total duration (API):  0s
Total duration (wall): 18.9s
Total code changes:    0 lines added, 0 lines removed
Tokens:                0 input, 0 output, 0 cache read, 0 cache write

Additional Context

<!-- Add any other context about the problem here, such as screenshots, logs, etc. -->