What’s Vulnerable › Vulnerabilities

CVE-2023-26150

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-10-03 · updated 2026-06-17
• Weakness: CWE-287

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.

Affected products

• Freeopcua Opcua-Asyncio: before 0.9.96 — fixed in 0.9.96

How to fix

Upgrade to a fixed version: Freeopcua Opcua-Asyncio 0.9.96. Check the vendor advisory for mitigations.

References

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

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