CVE-2022-21208: The package node-opcua before 2.74.0 are vulnerable to Denial of Service (DoS) due to a missing limitation on

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HIGH 7.5REMOTEUPGRADE

CVE-2022-21208 is a high-severity flaw (CVSS 7.5) affecting node-opcua. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The package node-opcua before 2.74.0 are vulnerable to Denial of Service (DoS) due to a missing limitation on the number of received chunks - per single session or in total for all concurrent sessions. An attacker can exploit this vulnerability by sending an unlimited number of huge chunks (e.g. 2GB each) without sending the Final closing chunk.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Weakness	CWE-1284
Published	2022-08-23
Last modified	2026-06-17

Publisher (CNA): Snyk · Vendor: node-opcua project

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

Am I affected?

Timeline

2022-08-23 05:15 UTCPublished CVE record published
2026-06-17 04:25 UTCUpdated Record last modified

node-opcua project node-opcua UPGRADE

Affected: < 2.74.0

Fixed in: 2.74.0

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls node-opcua

2. UPGRADE to 2.74.0

npm install node-opcua@">=2.74.0"

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-2022-21208?

node-opcua: upgrade to 2.74.0. Exact commands for each OS are on this page.

Is CVE-2022-21208 being exploited?

CVE-2022-21208 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-2022-21208 affect?

CVE-2022-21208 affects node-opcua. Severity is high (CVSS 7.5). The package node-opcua before 2.74.0 are vulnerable to Denial of Service (DoS) due to a missing limitation on the number of received chunks - per single session or in total for all concurrent sessions. An attacker can exploit this vulnerabi

How urgent is CVE-2022-21208?

Priority 50/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2022-25231 HIGH 7.5 UPGRADE The package node-opcua before 2.74.0 are vulnerable to Denial of Service (DoS) by sending a specifically craft
CVE-2022-24375 HIGH 7.5 UPGRADE The package node-opcua before 2.74.0 are vulnerable to Denial of Service (DoS) when bypassing the limitations

References

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