Issues

• Bug: VPC Lattice v2 parser model rejects real events because headers and query strings are lists

  aws-powertools/powertools-lambda-python#8773 · Filter by author Manishram-ai opened on Nov 5, 2026

• Bug: thread_safe_remove_keys in one thread or task removes the key everywhere that copied the context

  aws-powertools/powertools-lambda-python#8771 · Filter by author haeganm opened on Nov 4, 2026
  2

• Bug: SES parser model and data class reject emails without To or Subject, and RequestResponse actions

  aws-powertools/powertools-lambda-python#8767 · Filter by author Manishram-ai opened on Nov 4, 2026

• Bug: POWERTOOLS_DEV set to an empty string crashes Logger initialization

  aws-powertools/powertools-lambda-python#8765 · Filter by author zhanfan-818 opened on Nov 4, 2026
  2

• Bug: Cognito parser models reject real trigger events

  aws-powertools/powertools-lambda-python#8761 · Filter by author Manishram-ai opened on Nov 3, 2026

• Bug: POWERTOOLS_PARAMETERS_MAX_AGE set to an empty or non-integer value crashes every parameters call

  buggood first issueparameters
  aws-powertools/powertools-lambda-python#8747 · Filter by author AP24110011695 opened on Nov 2, 2026 · 3.41.0
  4

  

• Maintenance: drop support for Python 3.10 on February 1, 2027

  documentationinternal
  aws-powertools/powertools-lambda-python#8735 · Filter by author leandrodamascena opened on Nov 1, 2026
  1

• Docs: IdempotencyConfig docstring says local_cache_max_items defaults to 1024, it is 256

  documentationgood first issuehelp wantedidempotency
  aws-powertools/powertools-lambda-python#8729 · Filter by author leandrodamascena opened on Oct 31, 2026 · 3.41.0
  5

  

• Bug: POWERTOOLS_IDEMPOTENCY_DISABLED set to an empty or non-boolean value crashes every invocation

  buggood first issuehelp wantedidempotency
  aws-powertools/powertools-lambda-python#8728 · Filter by author leandrodamascena opened on Oct 31, 2026 · 3.41.0
  4

  

• Bug: Redis layer fails the invocation instead of retrying when a record expires between SET NX and GET

  buggood first issuehelp wantedidempotency
  aws-powertools/powertools-lambda-python#8727 · Filter by author leandrodamascena opened on Oct 31, 2026 · 3.41.0
  4

  

• Bug: Redis orphan lock timeout ignores expires_after_seconds and is always 10 seconds

  buggood first issuehelp wantedidempotency
  aws-powertools/powertools-lambda-python#8726 · Filter by author leandrodamascena opened on Oct 31, 2026 · 3.41.0
  4

  

• Bug: idempotency payloads with set, frozenset or bytes fields cannot be hashed

  buggood first issuehelp wantedidempotency
  aws-powertools/powertools-lambda-python#8725 · Filter by author leandrodamascena opened on Oct 31, 2026 · 3.41.0
  6

  

• Bug: with a DynamoDB composite key, DataRecord.idempotency_key is the static partition key value

  buggood first issuehelp wantedidempotency
  aws-powertools/powertools-lambda-python#8724 · Filter by author leandrodamascena opened on Oct 31, 2026 · 3.41.0
  3

  

• Bug: DataclassSerializer cannot save datetime/UUID fields and does not rebuild nested dataclasses on replay

  buggood first issuehelp wantedidempotency
  aws-powertools/powertools-lambda-python#8723 · Filter by author leandrodamascena opened on Oct 31, 2026 · 3.41.0
  5

  

• Bug: output_serializer=PydanticSerializer crashes at import under from __future__ import annotations

  buggood first issuehelp wantedidempotency
  aws-powertools/powertools-lambda-python#8722 · Filter by author leandrodamascena opened on Oct 31, 2026 · 3.41.0
  6

  

• Bug: a result that is not JSON serializable leaves the idempotency record stuck as INPROGRESS

  buggood first issuehelp wantedidempotency
  aws-powertools/powertools-lambda-python#8721 · Filter by author leandrodamascena opened on Oct 31, 2026 · 3.41.0
  3

  

• Bug: data masking prepare_data leaves dataclasses and Pydantic models unconverted

  aws-powertools/powertools-lambda-python#8672 · Filter by author LemonCondor opened on Oct 26, 2026
  1

• Bug: Cookie Expires labels a non-UTC aware datetime as GMT without converting it

  bugevent_handlers
  aws-powertools/powertools-lambda-python#8671 · Filter by author LemonCondor opened on Oct 26, 2026 · 3.40.0
  2

  

• Bug: POWERTOOLS_METRICS_DISABLED is ignored by single_metric, the cold start metric, add_metric auto-flush and Datadog's lambda_metric

  bugmetrics
  aws-powertools/powertools-lambda-python#8667 · Filter by author soujasK opened on Oct 25, 2026 · 3.40.0
  2

  

• Bug: SqsFifoPartialProcessor fails the whole batch when a short-circuited record doesn't match the model

  batchbuggood first issue
  aws-powertools/powertools-lambda-python#8661 · Filter by author soujasK opened on Oct 25, 2026 · 3.40.0
  2

  

• Bug: idempotent functions sharing a persistence layer silently use the first function's IdempotencyConfig

  bugidempotency
  aws-powertools/powertools-lambda-python#8659 · Filter by author soujasK opened on Oct 25, 2026 · 3.40.0
  4

  

• Bug: DataMasking.erase with masking_rules ignores JSON string input

  aws-powertools/powertools-lambda-python#8636 · Filter by author LemonCondor opened on Oct 19, 2026

• Maintenance: Support for Python 3.15

  internaltriage
  aws-powertools/powertools-lambda-python#8543 · Filter by author leandrodamascena opened on Oct 12, 2026

• Tech debt: make partition layer deployment safe to resume

  tech-debt
  aws-powertools/powertools-lambda-python#8433 · Filter by author dreamorosi opened on Sep 4, 2026
  

• RFC: Event Router

  RFC
  aws-powertools/powertools-lambda-python#8287 · Filter by author leandrodamascena opened on Jun 20, 2026
  9