Denial of Service Vulnerability in open62541 by open62541
CVE-2026-67856

7.5HIGH

Key Information:

Vendor

open62541

Status
open62541
Vendor
CVE Published:
4 August 2026

What is CVE-2026-67856?

A vulnerability in open62541 versions 1.5.5 and earlier allows remote attackers to induce a denial of service by sending crafted requests including CreateSubscription, CreateMonitoredItems(Sampling), Publish, TransferSubscriptions, and DeleteSubscriptions. This can lead to instability in the service and potential outages, affecting the availability of the system for legitimate users.

References

https://github.com/open62541/open62541/issues/8092
https://github.com/open62541/open62541/blob/master/src/se...
https://github.com/open62541/open62541/blob/master/src/se...

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.