CVE-2026-67856

EUVD-2026-52968
An issue in open62541 v.1.5.5 and before allows a remote attacker to cause a denial of service via crafted CreateSubscription, CreateMonitoredItems(Sampling), Publish, TransferSubscriptions, and DeleteSubscriptions requests
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 35.62%
Debian logo
Debian Releases
Debian Product
Codename
open62541
forky
vulnerable
sid
vulnerable
trixie
no-dsa
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
open62541
jammy
dne
noble
dne
resolute
needs-triage
Common Weakness Enumeration
References
https://github.com/open62541/open62541/blob/master/examples/access_control/server_access_control.c
https://github.com/open62541/open62541/blob/master/src/server/ua_services_subscription.c
https://github.com/open62541/open62541/blob/master/src/server/ua_subscription.c
https://github.com/open62541/open62541/blob/master/src/server/ua_subscription.h
https://github.com/open62541/open62541/issues/8092
https://github.com/open62541/open62541/issues/8092