How severe is CVE-2023-26151?

CVE-2023-26151 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2023-26151 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-26151?

CVE-2023-26151 affects Freeopcua Opcua-asyncio. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-26151?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-26151 published?

CVE-2023-26151 was published on 2023-10-03 and last updated on 2026-06-17.

CVE-2023-26151

CVE-2023-26151 is a medium-severity vulnerability in Freeopcua Opcua-asyncio with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-835.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-835
Affected product: Freeopcua Opcua-asyncio
Published: 2023-10-03
Last modified: 2026-06-17

Description

Versions of the package asyncua before 0.9.96 are vulnerable to Denial of Service (DoS) such that an attacker can send a malformed packet and as a result, the server will enter into an infinite loop and consume excessive memory.

Frequently asked questions

What is CVE-2023-26151?: Versions of the package asyncua before 0.9.96 are vulnerable to Denial of Service (DoS) such that an attacker can send a malformed packet and as a result, the server will enter into an infinite loop and consume excessive memory.
How severe is CVE-2023-26151?: CVE-2023-26151 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2023-26151 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-26151?: CVE-2023-26151 affects Freeopcua Opcua-asyncio. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-26151?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-26151 published?: CVE-2023-26151 was published on 2023-10-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:freeopcua:opcua-asyncio:*:*:*:*:*:python:*:*

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