CVE-2026-86065
highKlever-Go is the Go implementation of the Klever blockchain protocol.
Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.20, the default-open GET /subscribe endpoint in network/api/websocket/routes.go accepts unauthenticated WebSocket clients with permissive origin handling, does not call SetReadLimit to bound message size, and has no live-connection cap. SocketHub.HandleClientInsertion also accepts an unbounded address list that grows addressSubscription, and client.loopIn continues reading without a size limit, allowing one client to grow subscription maps or many clients to retain goroutines, buffered channels, and descriptors. The global HTTP request throttler does not count upgraded live WebSocket connections. Because the REST and WebSocket API runs in the node process, memory or scheduler exhaustion can crash the node and interrupt P2P and consensus participation. This issue is fixed in version 1.7.20.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/klever-io/klever-go/commit/b8af922e749ec1fa7451b2c6e7c9f634d8603be2 security-advisories@github.com
- https://github.com/klever-io/klever-go/pull/76 security-advisories@github.com
- https://github.com/klever-io/klever-go/releases/tag/v1.7.20 security-advisories@github.com
- https://github.com/klever-io/klever-go/security/advisories/GHSA-4fwh-wrm6-97xm security-advisories@github.com
- https://github.com/klever-io/klever-go/security/advisories/GHSA-4fwh-wrm6-97xm 134c704f-9b21-4f2e-91b3-4a467353bcc0