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Refactor: Request Parsing/Response Serialization
#9073 · bpandola opened on Jul 17, 2025
1

DynamoDB: a base-table Query sorts the whole table, so a point Query costs O(table size)
getmoto/moto#10401 · opened on Oct 18, 2026
1
S3 upload_part hangs and returns 400 in 5.2.4 when mock_aws is active alongside ThreadedMotoServer
getmoto/moto#10384 · opened on Oct 14, 2026
1
Gracefully fail when hashlib.md5 is missing on OpenSSL 4 FIPS systems
getmoto/moto#10382 · opened on Oct 14, 2026
FSX Pagination - The limit default is set really high
getmoto/moto#10381 · opened on Oct 14, 2026
Important Update: 19 more AWS services now support the Smithy RPC v2 CBOR protocol (public preview)
getmoto/moto#10379 · opened on Oct 13, 2026
GET /<userPoolId>/.well-known/openid-configuration returns 500 (Cognito IDP)
getmoto/moto#10375 · opened on Oct 12, 2026
IOT Pagination - overriding the paginator’s configured default
getmoto/moto#10364 · opened on Oct 11, 2026
DeleteMessageBatch and ChangeMessageVisibilityBatch skip batch entry validation
getmoto/moto#10324 · opened on Oct 3, 2026
1
SQS: ReceiveMessage and DeleteMessage get slower as the queue grows
getmoto/moto#10306 · opened on Sep 30, 2026
2
SWF: missing workflow execution members raise unhandled exceptions
getmoto/moto#10263 · opened on Sep 17, 2026
3
EC2: run_instances launches MinCount instances, MaxCount is ignored
getmoto/moto#10215 · opened on Aug 31, 2026
Codepipeline: Implement put_job_success_result & put_job_failure_result
getmoto/moto#10190 · opened on Aug 15, 2026
3
DynamoDB: Incorrect item size calculation for Number attributes
getmoto/moto#10176 · opened on Aug 11, 2026
1
CloudFormation: update_stack_instances aborts the whole batch instead of processing each account/region independently
getmoto/moto#10173 · opened on Aug 10, 2026
CloudFormation: Creating a launch template through CF add the CFT tags
getmoto/moto#10168 · opened on Aug 7, 2026
3
StepFunctions: tasks with apigateway:invoke fail without issuing an HTTP request
getmoto/moto#10163 · opened on Aug 3, 2026
SNS: Server unable to handle too much load — AWS SDK connection pool acquire timeout
getmoto/moto#10108 · opened on Jul 15, 2026
3
StepFunctions parser: JSONata evaluator is never wired (eval_jsonata_expression calls a None pointer) -> every JSONata expression raises TypeError
getmoto/moto#10105 · opened on Jul 13, 2026
StepFunctions parser: jsonpath_ng backend doesn't implement AWS JSONPath filter dialect (&&/|| parse error; empty filter raises instead of [])
getmoto/moto#10078 · opened on Jun 30, 2026
StepFunctions parser: states:::states:startExecution.sync fails with KeyError 'Input' (PascalCase params not converted to boto casing)
getmoto/moto#10076 · opened on Jun 29, 2026
3
Security Threat Model: Server Mode Exposes Critical Attack Surface
getmoto/moto#9941 · opened on Mar 31, 2026
boto3 methods can be very slow when using localhost endpoint with ThreadedMotoServer on windows
getmoto/moto#9918 · opened on Mar 27, 2026
6
Important AWS Update - Service wire protocol selection
getmoto/moto#9811 · opened on Mar 3, 2026
1
[Glue] Support OpenTableFormatInput for Iceberg table creation
getmoto/moto#9705 · opened on Feb 5, 2026
2
Cloudformation stack apply failed with 404
getmoto/moto#9701 · opened on Feb 4, 2026
3

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Issues

Issues

DynamoDB: a base-table Query sorts the whole table, so a point Query costs O(table size)

S3 upload_part hangs and returns 400 in 5.2.4 when mock_aws is active alongside ThreadedMotoServer

Gracefully fail when hashlib.md5 is missing on OpenSSL 4 FIPS systems

FSX Pagination - The limit default is set really high

Important Update: 19 more AWS services now support the Smithy RPC v2 CBOR protocol (public preview)

`GET /<userPoolId>/.well-known/openid-configuration` returns 500 (Cognito IDP)

IOT Pagination - overriding the paginator’s configured default

DeleteMessageBatch and ChangeMessageVisibilityBatch skip batch entry validation

SQS: ReceiveMessage and DeleteMessage get slower as the queue grows

SWF: missing workflow execution members raise unhandled exceptions

EC2: run_instances launches MinCount instances, MaxCount is ignored

Codepipeline: Implement put_job_success_result & put_job_failure_result

DynamoDB: Incorrect item size calculation for Number attributes

CloudFormation: update_stack_instances aborts the whole batch instead of processing each account/region independently

CloudFormation: Creating a launch template through CF add the CFT tags

StepFunctions: tasks with `apigateway:invoke` fail without issuing an HTTP request

SNS: Server unable to handle too much load — AWS SDK connection pool acquire timeout

StepFunctions parser: JSONata evaluator is never wired (eval_jsonata_expression calls a None pointer) -> every JSONata expression raises TypeError

StepFunctions parser: jsonpath_ng backend doesn't implement AWS JSONPath filter dialect (&&/|| parse error; empty filter raises instead of [])

StepFunctions parser: states:::states:startExecution.sync fails with KeyError 'Input' (PascalCase params not converted to boto casing)

Security Threat Model: Server Mode Exposes Critical Attack Surface

boto3 methods can be very slow when using localhost endpoint with ThreadedMotoServer on windows

Important AWS Update - Service wire protocol selection

[Glue] Support OpenTableFormatInput for Iceberg table creation

Cloudformation stack apply failed with 404