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CVE-2023-26150

20
FAUCET Score

CVE-2023-26150 is an Improper Authentication vulnerability affecting versions of the asyncua package prior to 0.9.96, including freeopcua and opcua-asyncio. This flaw allows an unauthenticated attacker to access the Address Space without encryption or authentication due to missing session checks for certain services. Rated 7.5 HIGH (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N), it presents a significant risk for confidentiality. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.9.96CPE matchmatch criteria
cpe:2.3:a:freeopcua:opcua-asyncio:*:*:*:*:*:python:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.45%
Probability of exploitation in next 30 days
EPSS Percentile
37.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0045 is in the 16th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
pippatch availablevia ghsa
Product: asyncuaFixed in: 0.9.96

Vendor Advisories (1)

pipGHSA-2894-qcqf-g23ghigh

asyncua Improper Authentication vulnerability

Oct 3, 2023

References

gist.github.com / artfire52/84f7279a4119d6f90381ac49d7121121
ExploitThird Party Advisory
github.com / FreeOpcUa/opcua-asyncio/commit/2be7ce80df05de8d6c6ae1ebce6fa2bb7147844a
Patch
github.com / FreeOpcUa/opcua-asyncio/commit/b4106dfd5037423c9d1810b48a97296b59cde513
Patch
github.com / FreeOpcUa/opcua-asyncio/issues/1014
ExploitIssue TrackingThird Party Advisory
github.com / FreeOpcUa/opcua-asyncio/pull/1015
Patch
github.com / FreeOpcUa/opcua-asyncio/releases/tag/v0.9.96
ProductRelease Notes
security.snyk.io / vuln/SNYK-PYTHON-ASYNCUA-5673435
ExploitPatchThird Party Advisory