CVE-2026-86065 Klever-Go - Denial of Service

Klever-Go < 1.7.20 contains a denial of service caused by unauthenticated WebSocket clients with unbounded message size and subscription growth in the /subscribe endpoint, letting attackers exhaust memory and crash the node, exploit requires network access.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.35% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
23 September 2026
Updated
15 October 2026
Weakness
CWE-770

Vendor fix

Update to version 1.7.20 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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