CVE-2023-26151
asyncua vulnerable to denial of service via infinite loop
CVE-2023-26151 is a medium vulnerability (CVSS 5.3) in Freeopcua Opcua-asyncio, published October 3, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.18%, the 68th percentile. Fixed in asyncua 0.9.96.
- Severity
- 5.3 MediumCVSS 3.1, CVE List
- Exploit chance
- 1.18%EPSS, 68th percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
0.9.96asyncua +5 more
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- Low
Exploit likelihood
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
asyncuaPyPI | before 0.9.96 | 0.9.96 |
asyncuaPyPI | before 0.9.96, plus listed versions 0.5.00.5.10.6.00.6.10.8.0 Show 21 moreShow less0.8.10.8.20.8.30.8.40.9.00.9.10.9.100.9.110.9.120.9.140.9.20.9.30.9.60.9.80.9.90.9.900.9.910.9.920.9.930.9.940.9.95 | 0.9.96 |
asyncuaPyPI | before 0.9.96, plus listed versions 0.5.00.5.10.6.00.6.10.8.0 Show 45 moreShow less0.8.10.8.20.8.30.8.40.9.00.9.10.9.100.9.110.9.120.9.140.9.20.9.30.9.60.9.80.9.90.9.900.9.910.9.920.9.930.9.940.9.95v0.9.95v0.9.94v0.9.93v0.9.92v0.9.91v0.9.90v0.9.12v0.9.11v0.9.10v0.9.80.9.70.9.40.90.40.90.30.90.20.90.10.90.00.10.170.10.150.10.140.10.120.10.110.10.90.10.8 | 0.9.96 |
python-opcuaUbuntu:18.04:LTS | All versions, plus listed versions 0.90.3-1 | None known |
python-opcuaUbuntu:20.04:LTS | All versions, plus listed versions 0.98.6-30.98.6-3ubuntu10.98.9-1 | None known |
python-opcuaUbuntu:22.04:LTS | All versions, plus listed versions 0.98.11-10.98.11-1ubuntu1 | None known |
What each source reports
CVE List Score used
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.
- Record
CVE-2023-26151- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P - Weakness
- CWE-400
- Updated
- 2026-11-02
EUVDEUVD-2023-0048
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.
- Record
EUVD-2023-0048- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-gfvq-mxw3-mfq3
asyncua vulnerable to denial of service via infinite loop
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.
- Record
GHSA-gfvq-mxw3-mfq3- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-835
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2023-26151- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-400, CWE-835
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2023-26151- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P - Weakness
- CWE-400
- Updated
- 2026-11-02
OSVGHSA-gfvq-mxw3-mfq3
asyncua vulnerable to denial of service via infinite loop
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.
- Record
GHSA-gfvq-mxw3-mfq3- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-835
- Updated
- 2026-11-02
OSVPYSEC-2023-190
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.
- Record
PYSEC-2023-190- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-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.
- Record
UBUNTU-CVE-2023-26151- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
References
security.snyk.io/vuln/SNYK-PYTHON-ASYNCUA-5673709
gist.github.com/artfire52/1540b234350795e0ecb4d672608dbec8
github.com/FreeOpcUa/opcua-asyncio/issues/1013
Show 7 moreShow less
nvd.nist.gov/vuln/detail/CVE-2023-26151
ubuntu.com/security/CVE-2023-26151
cve.org/CVERecord?id=CVE-2023-26151
Left out here: 14 versions. The JSON record has them.