HIGH7.5

PYSEC-2026-2385

Uncontrolled Resource Consumption in asyncua and opcua

Quick fix

PYSEC-2026-2385 — asyncua: upgrade to the fixed version with the command below.

pip install --upgrade 'asyncua>=0.9.96'

Details

All versions of package opcua; all versions of package asyncua are vulnerable to Denial of Service (DoS) due to a missing limitation on the number of received chunks - per single session or in total for all concurrent sessions. An attacker can exploit this vulnerability by sending an unlimited number of huge chunks (e.g. 2GB each) without sending the Final closing chunk.

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI/asyncua

Introduced in: 0Fixed in: 0.9.96

Fixpip install --upgrade 'asyncua>=0.9.96'

References

https://nvd.nist.gov/vuln/detail/CVE-2022-25304[ADVISORY]
https://github.com/FreeOpcUa/python-opcua/issues/1466[WEB]
https://github.com/FreeOpcUa/opcua-asyncio/commit/01c7acf047887b62d979cd4373d370e72a4b9057[WEB]
https://github.com/FreeOpcUa/opcua-asyncio[PACKAGE]
https://security.snyk.io/vuln/SNYK-PYTHON-ASYNCUA-2988731[WEB]
https://security.snyk.io/vuln/SNYK-PYTHON-OPCUA-2988730[WEB]
https://pypi.org/project/asyncua[PACKAGE]
https://github.com/advisories/GHSA-mfpj-3qhm-976m[ADVISORY]