Issues

• HELLO with ReceiveBufferSize=0 produces an ACK with invalid buffer limits

  FreeOpcUa/opcua-asyncio#2046 · Filter by author Wang-jiong-han opened on Oct 2, 2026

• Server accepts repeated HELLO messages on the same TCP connection

  FreeOpcUa/opcua-asyncio#2044 · Filter by author Wang-jiong-han opened on Oct 2, 2026

• Hostname comparison in client application certificate is too sensitive

  FreeOpcUa/opcua-asyncio#2042 · Filter by author CuriousCrook opened on Sep 23, 2026

• Invalid type hints in uaprotocol_auto.py: (ua not imported)

  FreeOpcUa/opcua-asyncio#2039 · Filter by author wookie184 opened on Sep 8, 2026
  1

• [Security] Any plans on implementing elliptic curve cryptography?

  FreeOpcUa/opcua-asyncio#2014 · Filter by author m4rl0ne opened on Aug 8, 2026

• Need fix for known bug

  FreeOpcUa/opcua-asyncio#1982 · Filter by author Alexender676 opened on May 29, 2026

• UALS command does not work when installing from PyPi

  FreeOpcUa/opcua-asyncio#1973 · Filter by author haydenramm opened on May 15, 2026

• OpenTelemetry tracing support — interest in native integration?

  FreeOpcUa/opcua-asyncio#1972 · Filter by author luke6Lh43 opened on May 14, 2026
  8

• Event filter: TypeDefinitionId always BaseEventType — breaks strict servers (Part 4 §7.4.4.5)

  FreeOpcUa/opcua-asyncio#1968 · Filter by author onclefranck opened on May 8, 2026

• [Security] Unauthenticated Memory Exhaustion via GetEndpointsRequest Chunked Transport (DoS)

  FreeOpcUa/opcua-asyncio#1963 · Filter by author Giancannella opened on May 7, 2026
  1

• [Security] Unauthenticated Memory Exhaustion via FindServersRequest Chunked Transport (DoS)

  FreeOpcUa/opcua-asyncio#1962 · Filter by author Giancannella opened on May 7, 2026
  5

• BUG: Pub Sub reader Decoded value type-guessed as Int64

  FreeOpcUa/opcua-asyncio#1961 · Filter by author RyanPaesschesooneVintecc opened on Apr 24, 2026
  4

• OPC UA Reverse Connect implementation

  FreeOpcUa/opcua-asyncio#1948 · Filter by author Haeavar opened on Mar 9, 2026

• Server does not honor MaxNotificationsPerPublish for subscriptions

  FreeOpcUa/opcua-asyncio#1931 · Filter by author DOhlsson opened on Feb 16, 2026

• get_child() unable to find child

  FreeOpcUa/opcua-asyncio#1930 · Filter by author buhln opened on Feb 13, 2026
  12

• Version conflicts when importing UA FX xml-files from UA-Nodeset

  FreeOpcUa/opcua-asyncio#1923 · Filter by author anniewerndin opened on Jan 29, 2026
  1

• How to use the latest release of opcua-asyncio and configure what OPC UA core model version to load?

  FreeOpcUa/opcua-asyncio#1922 · Filter by author jamilraichouni opened on Jan 27, 2026
  1

• Documentation and up-to-date example for authorization and encryption for client missing

  FreeOpcUa/opcua-asyncio#1921 · Filter by author aliksimon opened on Jan 27, 2026

• Lists in nested Extension Objects

  FreeOpcUa/opcua-asyncio#1915 · Filter by author Alexander-Zender opened on Jan 20, 2026

• Documentation to test method of minimal example OPC UA server missing

  FreeOpcUa/opcua-asyncio#1908 · Filter by author aliksimon opened on Jan 9, 2026
  1

• Receive BadEncoding error when subscribing event

  FreeOpcUa/opcua-asyncio#1905 · Filter by author YSong0429 opened on Dec 25, 2025

• write_attribute(DisplayName) not reflected in Browse ReferenceDescription

  FreeOpcUa/opcua-asyncio#1903 · Filter by author IT-and-OT-Lab opened on Dec 20, 2025

• Server.init() is not fully async and can block for over a second.

  FreeOpcUa/opcua-asyncio#1902 · Filter by author leothehero opened on Dec 16, 2025

• duplication of attribute in address_space._add_nodeattributes

  FreeOpcUa/opcua-asyncio#1895 · Filter by author lauler1 opened on Nov 28, 2025

• "RuntimeError: Unknown datatype for ... in ..., please report"

  FreeOpcUa/opcua-asyncio#1894 · Filter by author betsch85 opened on Nov 26, 2025
  2