CVE-2023-26150: Versions of the package asyncua before 0.9.96 are vulnerable to Improper Authentication such that it is possib

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MEDIUM 6.5REMOTEUPGRADE

CVE-2023-26150 is a medium-severity flaw (CVSS 6.5) affecting opcua-asyncio. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 56%)
CISA exploited list	No
Weakness	CWE-287
Published	2023-10-03
Last modified	2026-06-17

Publisher (CNA): Snyk · Vendor: freeopcua

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-10-03 05:15 UTCPublished CVE record published
2026-06-17 05:42 UTCUpdated Record last modified

freeopcua opcua-asyncio UPGRADE

Affected: < 0.9.96

Fixed in: 0.9.96

Safe to downgrade to: no unaffected older release

1. Check installed version

pip show opcua-asyncio

2. UPGRADE to 0.9.96

pip install --upgrade "opcua-asyncio>=0.9.96"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-26150?

opcua-asyncio: upgrade to 0.9.96. Exact commands for each OS are on this page.

Is CVE-2023-26150 being exploited?

CVE-2023-26150 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-26150 affect?

CVE-2023-26150 affects opcua-asyncio. Severity is medium (CVSS 6.5). 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 service

How urgent is CVE-2023-26150?

Priority 44/100. Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2023-26151 MEDIUM 5.3 UPGRADE Versions of the package asyncua before 0.9.96 are vulnerable to Denial of Service (DoS) such that an attacker

References

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