HIGH 7.5
PYSEC-2026-888
Uncontrolled Resource Consumption in asyncua and opcua
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 / opcua
Introduced in:
0 No fixed version published yet for opcua (pip). Pin to a known-safe version or switch to an alternative.
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/opcua [PACKAGE]
- https://github.com/advisories/GHSA-mfpj-3qhm-976m [ADVISORY]