Improper Access Control to Streaming Coordinator & SSRF
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.
Summary
All request mappings in `StreamingCoordinatorController.java` handling `/kylin/api/streaming_coordinator/*` REST API endpoints did not include any security checks, which allowed an unauthenticated user to issue arbitrary requests, such as assigning/unassigning of streaming cubes, creation/modification and deletion of replica sets, to the Kylin Coordinator. For endpoints accepting node details in HTTP message body, unauthenticated (but limited) server-side request forgery (SSRF) can be achieved. This issue affects Apache Kylin Apache Kylin 3 versions prior to 3.1.2.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Apache | Apache Kylin | Apache Kylin 3 to before 3.1.2 | 3.1.2 | Patch available | CNA |
| — | org.apache.kylin:kylin (Maven) | before 3.1.3 | 3.1.3 | Patch available | GHSA-wrx7-qgmj-mf2q |
- Apache Kylin VendorApache Affected Apache Kylin 3 to before 3.1.2 Fixed in 3.1.2 Patch available CNA
- org.apache.kylin:kylin (Maven) Vendor— Affected before 3.1.3 Fixed in 3.1.3 Patch available GHSA-wrx7-qgmj-mf2q
Remediation
- Fix · CNA Apache Kylin (Apache Software Foundation) Fixed in 3.1.2
- Fix · GHSA-wrx7-qgmj-mf2q org.apache.kylin:kylin (Maven) Fixed in 3.1.3 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2021-27738
- 2026-10-03 Alias added: GHSA-wrx7-qgmj-mf2q
References
Advisory 3
More Apache Kylin vulnerabilities
- TI-2020-01880 OS command injection in Apache Kylin KEVCVSS 3.1HIGH 8.8
- TI-2022-08515 OS command injection in Apache Kylin CVSS 3.1CRITICAL 9.8
- TI-2021-20543 Command injection in Apache Kylin CVSS 3.1CRITICAL 9.8
- TI-2022-21192 Apache Kylin: Command injection by Useless configuration CVSS 3.1HIGH 8.8
- TI-2020-10914 Insecure storage of sensitive information in Apache Kylin CVSS 3.1MEDIUM 5.3
- TI-2020-10903 OS command injection in Apache Kylin CVSS 3.1CRITICAL 9.8
Sources
- CVE-2021-27738 · CVE Program
- CVE-2021-27738 · NVD
- FIRST EPSS
- GHSA-wrx7-qgmj-mf2q · GitHub Advisory Database · CC BY 4.0
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