CVE-2026-54156

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Source
https://cve.org/CVERecord?id=CVE-2026-54156
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54156.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-54156
Aliases
Published
2026-09-14T16:09:07Z
Modified
2026-09-16T03:46:30Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
node-opcua: Unbounded nonce cache enables unauthenticated heap exhaustion DoS
Details

node-opcua is an OPC UA implementation for TypeScript and Node.js. Prior to 2.166.0, the process-global g_alreadyUsedNonce cache used by nonceAlreadyBeenUsed in packages/node-opcua-secure-channel/source/server/server_secure_channel_layer.ts records nonces from OpenSecureChannelRequest and CreateSession without expiration or a size limit. An unauthenticated remote attacker can repeatedly create sessions with unique nonces, causing entries to persist after session expiry and accumulate across connection cycles even when maxSessions=10 limits concurrent sessions. The resulting unbounded heap growth can exhaust the default Node.js heap and crash the node-opcua server process. This issue is fixed in version 2.166.0.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54156.json"
}
References

Affected packages

Git / github.com/node-opcua/node-opcua

Affected ranges

Type
GIT
Repo
https://github.com/node-opcua/node-opcua
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
b82c2939fe9c658de58da993f2798ec5481d7313
Fixed
b50d48c0ebd4761670529bf66f39a9c402a07845
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "2.166.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

0.*
0.0.45
0.0.7
0.0.8
V0.*
V0.2.0
v.*
v.0.0.53
v0.*
v0.0.11
v0.0.14
v0.0.19
v0.0.20
v0.0.21
v0.0.22
v0.0.23
v0.0.24
v0.0.3
v0.0.34
v0.0.35
v0.0.37
v0.0.38
v0.0.39
v0.0.4
v0.0.40
v0.0.41
v0.0.42
v0.0.45
v0.0.46
v0.0.47
v0.0.48
v0.0.49
v0.0.5
v0.0.50
v0.0.51
v0.0.52
v0.0.53
v0.0.54
v0.0.55
v0.0.56
v0.0.56b
v0.0.57
v0.0.58
v0.0.59
v0.0.60
v0.0.61
v0.0.64
v0.0.65
v0.1.0-10
v0.1.0-11
v0.1.0-12
v0.1.0-13
v0.1.0-4
v0.1.0-5
v0.1.0-6
v0.1.0-7
v0.1.0-8
v0.1.0-9
v0.1.1-0
v0.2.0
v0.2.1
v0.2.2
v0.2.3
v0.3.0
v0.4.0
v0.4.1
v0.4.2
v0.4.3
v0.4.4
v0.4.5
v2.*
v2.0.0
v2.0.0-alpha.0
v2.0.0-alpha.10
v2.0.0-alpha.11
v2.0.0-alpha.13
v2.0.0-alpha.14
v2.0.0-alpha.15
v2.0.0-alpha.16
v2.0.0-alpha.17
v2.0.0-alpha.18
v2.0.0-alpha.19
v2.0.0-alpha.20
v2.0.0-alpha.21
v2.0.0-alpha.22
v2.0.0-alpha.23
v2.0.0-alpha.24
v2.0.0-alpha.25
v2.0.0-alpha.26
v2.0.0-alpha.27
v2.0.0-alpha.28
v2.0.0-alpha.29
v2.0.0-alpha.30
v2.0.0-alpha.31
v2.0.0-alpha.32
v2.0.0-alpha.33
v2.0.0-alpha.4
v2.0.0-alpha.5
v2.0.0-alpha.6
v2.0.0-alpha.7
v2.0.0-alpha.8
v2.0.0-alpha.9
v2.0.1
v2.1.0
v2.1.1
v2.1.2
v2.1.5
v2.1.6
v2.1.7
v2.1.8
v2.1.9
v2.10.0
v2.100.0
v2.101.0
v2.102.0
v2.103.0
v2.104.0
v2.105.0
v2.105.1
v2.106.0
v2.107.0
v2.108.0
v2.109.0
v2.11.0
v2.110.0
v2.111.0
v2.112.0
v2.113.0
v2.114.0
v2.115.0
v2.116.0
v2.117.0
v2.118.0
v2.119.0
v2.119.1
v2.119.2
v2.12.0
v2.120.0
v2.121.0
v2.122.0
v2.123.0
v2.124.0
v2.125.0
v2.126.0
v2.127.0
v2.127.1
v2.128.0
v2.129.0
v2.13.0
v2.130.0
v2.131.0
v2.132.0
v2.133.0
v2.134.0
v2.135.0
v2.136.0
v2.137.0
v2.138.0
v2.138.1
v2.139.0
v2.14.0
v2.140.0
v2.141.0
v2.142.0
v2.143.0
v2.144.0
v2.145.0
v2.146.0
v2.147.0
v2.148.0
v2.149.0
v2.15.0
v2.150.0
v2.151.0
v2.152.0
v2.153.0
v2.154.0
v2.155.0
v2.156.0
v2.157.0
v2.158.0
v2.159.0
v2.16.0
v2.160.0
v2.161.0
v2.162.0
v2.163.0
v2.163.1
v2.164.0
v2.164.1
v2.164.2
v2.165.0
v2.165.1
v2.165.2
v2.17.0
v2.18.0
v2.19.0
v2.2.0
v2.20.0
v2.21.0
v2.22.0
v2.23.0
v2.24.0
v2.24.1
v2.25.0
v2.26.0
v2.27.0
v2.27.1
v2.28.0
v2.28.1
v2.28.2
v2.28.3
v2.29.0
v2.3.0
v2.3.1
v2.30.0
v2.31.0
v2.32.0
v2.33.0
v2.34.0
v2.35.0
v2.36.0
v2.36.1
v2.36.2
v2.36.3
v2.37.0
v2.4.0
v2.4.1
v2.4.2
v2.4.3
v2.4.4
v2.40.0
v2.41.0
v2.41.1
v2.42.0
v2.42.1
v2.42.2
v2.43.0
v2.44.0
v2.45.0
v2.46.0
v2.47.0
v2.49.0
v2.5.0-alpha.0
v2.5.0-alpha.1
v2.5.0-alpha.10
v2.5.0-alpha.11
v2.5.0-alpha.12
v2.5.0-alpha.13
v2.5.0-alpha.14
v2.5.0-alpha.15
v2.5.0-alpha.2
v2.5.0-alpha.3
v2.5.0-alpha.4
v2.5.0-alpha.5
v2.5.0-alpha.6
v2.5.0-alpha.7
v2.5.0-alpha.8
v2.5.0-alpha.9
v2.5.1
v2.5.10
v2.5.11
v2.5.12
v2.5.2
v2.5.3
v2.5.4
v2.5.5
v2.5.6
v2.5.7
v2.5.8
v2.5.9
v2.50.0
v2.51.0
v2.52.0
v2.55.0
v2.56.0
v2.56.1
v2.56.2
v2.56.3
v2.57.0
v2.58.0
v2.59.0
v2.59.1
v2.6.0-alpha.0
v2.6.0-alpha.1
v2.6.0-alpha.6
v2.6.0-alpha.7
v2.6.1
v2.6.2
v2.6.3
v2.6.4
v2.6.5
v2.6.6
v2.6.7
v2.60.0
v2.60.1
v2.60.2
v2.61.0
v2.62.0
v2.62.1
v2.62.2
v2.62.3
v2.62.4
v2.62.5
v2.62.6
v2.62.7
v2.63.0
v2.63.1
v2.63.2
v2.64.0
v2.64.1
v2.65.0
v2.65.1
v2.66.0
v2.66.1
v2.66.2
v2.66.3
v2.67.0
v2.68.0
v2.68.1
v2.69.0
v2.69.1
v2.7.0
v2.70.0
v2.70.1
v2.70.2
v2.70.3
v2.71.0
v2.72.0
v2.72.1
v2.72.2
v2.73.0
v2.73.1
v2.74.0
v2.75.0
v2.76.0
v2.76.1
v2.76.2
v2.77.0
v2.78.0
v2.79.0
v2.79.1
v2.8.0
v2.8.1
v2.80.0
v2.80.1
v2.81.0
v2.82.0
v2.83.0
v2.84.0
v2.85.0
v2.86.0
v2.86.1
v2.87.0
v2.88.0
v2.89.0
v2.9.0
v2.9.1
v2.90.0
v2.90.1
v2.91.0
v2.91.1
v2.92.0
v2.93.0
v2.94.0
v2.95.0
v2.96.0
v2.97.0
v2.98.0
v2.98.1
v2.98.2
v2.99.0
v2.99.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54156.json"