How severe is CVE-2026-102748?

No CVSS score has been assigned to CVE-2026-102748 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2026-102748?

CVE-2026-102748 affects the following packages: github.com/dgraph-io/dgraph/v25 (Go). Ecosystems affected: Go.

How do I fix CVE-2026-102748?

Update github.com/dgraph-io/dgraph/v25 to 25.4.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-102748 is resolved across your whole dependency graph.

How do I detect CVE-2026-102748 in my Go dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/dgraph-io/dgraph/v25, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2026-102748 if there is no patch (or I can't update yet)?

Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Is CVE-2026-102748 actively exploited in the wild?

No public exploit code has been indexed for CVE-2026-102748 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2026-102748?

CVE-2026-102748 has an EPSS (Exploit Prediction Scoring System) score of 0.5%, placing it in the 41th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2026-102748?

CVE-2026-102748 is classified as Missing Authentication (CWE-306), CWE-862 (CWE-862). These weakness types describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2026-102748 published, and has it been updated?

CVE-2026-102748 was published on October 14, 2026 and was last updated on October 21, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐹 Go

Not in CISA KEV

CVE-2026-102748 — dgraph

Fix: dgraph-io/dgraph@c32f604

CVE-2026-102748 is a Missing Authentication vulnerability in github.com/dgraph-io/dgraph/v25. A fix is available for github.com/dgraph-io/dgraph/v25 — see the affected versions and patch details below.

Dgraph: Zero Unauthenticated HTTP Admin removeNode Denial of Service

Also known asGHSA-qj98-gp63-54xj

Published

Oct 14, 2026

Updated

Oct 21, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Oct 23, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

0.5%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs41th percentile — riskier than 41% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

1 pkg affected

🐹github.com/dgraph-io/dgraph/v25

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

Summary

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
/moveTablet

An 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.

Details

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:41
dgraph/cmd/zero/run.go:295-301
dgraph/cmd/zero/http.go:106-129
dgraph/cmd/zero/zero.go:475-477

The relevant behavior is:

disable-admin-http=false by default
/removeNode accepts attacker-controlled id and group
removeNode forwards those directly into Server.RemoveNode
for group=0, Server.RemoveNode immediately calls ProposePeerRemoval

This means a remote unauthenticated caller can directly trigger destructive membership operations if 6080 is exposed.

PoC

Read state without authentication

curl -i http://127.0.0.1:6080/state

Observed response included:

Zero node id=1
groupId=0
leader=true
cluster topology and tablet state

Write-capable route without authentication

curl -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.

Destructive unauthenticated removeNode

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.

Impact

Any deployment that exposes Zero HTTP on 6080 exposes destructive unauthenticated administrative capabilities.

An attacker can:

read cluster topology and control-plane metadata
allocate IDs and timestamps
invoke destructive membership actions
disrupt the Zero control plane
indirectly destabilize Alpha nodes that depend on Zero connectivity

This is a high-value unauthenticated administrative exposure and, in the reproduced case, a practical denial of service against the control plane.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐹Go	`github.com/dgraph-io/dgraph/v25`	all versions	25.4.0`go get github.com/dgraph-io/dgraph/v25@v25.4.0`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/dgraph-io/dgraph/v25, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/dgraph-io/dgraph/v25 to 25.4.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-102748 is resolved across your whole dependency graph.
Workarounds
Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Frequently Asked Questions

### Summary 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` - `/moveTablet` An 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`. ### Details The issue exists because Zero administrative HTTP endpoints are registered directly without any authentication or IP-whitelist wrapper. Relevant code paths: - `worker/server_

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