Klever-Go: Unauthenticated WebSocket /subscribe: no read-size limit, no connection cap, permissive origin -> remote node memory/goroutine exhaustion (DoS)

Summary The unauthenticated WebSocket endpoint GET /subscribe is registered open: true by default config/node/api.yaml and lets a remote, unauthenticated client exhaust the node's memory and goroutines. Because the REST API runs IN-PROCESS with the node — network/api/api.go Start... ends with...

CVE-2026-86065 Klever-Go: Unauthenticated WebSocket /subscribe: no read-size limit, no connection cap, permissive origin -> remote node memory/goroutine exhaustion (DoS)

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 n...

EUVD-2026-85575

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 n...

CVE-2026-86065

Klever-Go , the Go implementation of the Klever blockchain protocol, is vulnerable to remote denial-of-service (DoS) via the unauthenticated GET /subscribe endpoint prior to version 1.7.20 . The vulnerability stems from three compounding gaps: permissive origin handling (allowing any web origin),...

CVE-2026-86065 Klever-Go: Unauthenticated WebSocket /subscribe: no read-size limit, no connection cap, permissive origin -> remote node memory/goroutine exhaustion (DoS)

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 n...

CVE-2026-86065 Klever-Go: Unauthenticated WebSocket /subscribe: no read-size limit, no connection cap, permissive origin -> remote node memory/goroutine exhaustion (DoS)

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 n...

CVE-2026-86065

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 n...

GHSA-9V8P-FRVJ-2PCM Klever-Go: /log controls global node logging

An unauthenticated client can connect to GET /log, send an arbitrary logger profile as the first WebSocket message, and mutate the node's global logging configuration before receiving live logs from the process. I confirmed this against a local validator built from this repository: an...

Klever-Go: /log controls global node logging

An unauthenticated client can connect to GET /log, send an arbitrary logger profile as the first WebSocket message, and mutate the node's global logging configuration before receiving live logs from the process. I confirmed this against a local validator built from this repository: an...

CVE-2026-86064 Klever-Go: /log controls global node logging

Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.20, the default-open GET /log WebSocket route configured in config/node/api.yaml and registered by network/api/api.go does not require authentication. The first client message is parsed as a logger Profile in...

CVE-2026-86064 Klever-Go: /log controls global node logging

Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.20, the default-open GET /log WebSocket route configured in config/node/api.yaml and registered by network/api/api.go does not require authentication. The first client message is parsed as a logger Profile in...

CVE-2026-86064

The Klever-Go blockchain protocol implementation is vulnerable to an unauthenticated management-plane flaw where a remote client can access and manipulate global logging configurations. Specifically, the GET /log WebSocket route—exposed by default in config/node/api.yaml and registered in network...

CVE-2026-86064 Klever-Go: /log controls global node logging

Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.20, the default-open GET /log WebSocket route configured in config/node/api.yaml and registered by network/api/api.go does not require authentication. The first client message is parsed as a logger Profile in...

CVE-2026-86064

Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.20, the default-open GET /log WebSocket route configured in config/node/api.yaml and registered by network/api/api.go does not require authentication. The first client message is parsed as a logger Profile in...

undici: undici: Denial of Service via unrequested WebSocket subprotocol

A flaw was found in undici. A remote attacker can exploit this vulnerability by responding with an unrequested WebSocket subprotocol during the opening handshake. This causes the undici WebSocket client to crash the entire Node.js process, leading to a denial of service DoS...

undici: undici: Denial of Service via unhandled error in WebSocket permessage-deflate decompression

A flaw was found in undici. A remote, unauthenticated attacker can trigger a Denial of Service DoS by sending a specially crafted compressed WebSocket payload. When this payload exceeds the 128 MiB decompressed-payload limit and contains a malformed DEFLATE byte, it causes an unhandled error in t...

CVE-2026-71300

A flaw was found in Apache Camel Atmosphere Websocket. This improper input validation vulnerability allows a remote attacker to inject specific Exchange headers, such as websocket.connectionKey.list, which are not properly filtered. By manipulating these headers, an attacker can take control of t...

SUSE CVE-2026-83599

Netdata is an open source observability tool. Prior to 2.11.0, Netdata's unauthenticated WebSocket server negotiates permessage-deflate before authentication, and src/web/websocket/websocket-compression.c allows websocketclientdecompressmessage to grow decompressed output toward...

Improper Handling of Length Parameter Inconsistency

Overview org.apache.tomcat:tomcat-websocket is a Tomcat WebSocket JSR356 implementation. Affected versions of this package are vulnerable to Improper Handling of Length Parameter Inconsistency via the getMoreData method in the PerMessageDeflate transformation. An attacker can send a...

Improper Handling of Length Parameter Inconsistency

Overview Affected versions of this package are vulnerable to Improper Handling of Length Parameter Inconsistency via the getMoreData method in the PerMessageDeflate transformation. An attacker can send a per-message-deflate payload containing multiple DEFLATE blocks where a block sets BFINAL befo...