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TI-2021-11651 Aliases CVE-2021-31522GHSA-q656-g2x3-8cgh

Apache Kylin unsafe class loading

Priority MEDIUM 48CWE-470Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.

Summary

Kylin can receive user input and load any class through Class.forName(...). This issue affects Apache Kylin 2 version 2.6.6 and prior versions; Apache Kylin 3 version 3.1.2 and prior versions; Apache Kylin 4 version 4.0.0 and prior versions.

Why it matters now

EPSS 0.02998 87th percentileScored 2026-11-07
Fix Fixed org.apache.kylin:kylin (Maven): 3.1.3, 4.0.1

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache KylinApache Kylin 2 – 2.6.6; Apache Kylin 3 – 3.1.2; Apache Kylin 4 – 4.0.0—No fix listedCNA
—org.apache.kylin:kylin (Maven)before 3.1.33.1.3Patch availableGHSA-q656-g2x3-8cgh
—org.apache.kylin:kylin (Maven)4.0.0 to before 4.0.14.0.1Patch availableGHSA-q656-g2x3-8cgh
  • Apache Kylin VendorApache Affected Apache Kylin 2 – 2.6.6; Apache Kylin 3 – 3.1.2; Apache Kylin 4 – 4.0.0 Fixed in — No fix listed CNA
  • org.apache.kylin:kylin (Maven) Vendor— Affected before 3.1.3 Fixed in 3.1.3 Patch available GHSA-q656-g2x3-8cgh
  • org.apache.kylin:kylin (Maven) Vendor— Affected 4.0.0 to before 4.0.1 Fixed in 4.0.1 Patch available GHSA-q656-g2x3-8cgh

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:a:apache:kylin:*:*:*:*:*:*:*:*2.0.0 – 2.6.6; 3.0.0 to before 3.1.3VulnerableApache
cpe:2.3:a:apache:kylin:4.0.0:-:*:*:*:*:*:*4.0.0VulnerableApache
cpe:2.3:a:apache:kylin:4.0.0:alpha:*:*:*:*:*:*4.0.0 alphaVulnerableApache
cpe:2.3:a:apache:kylin:4.0.0:beta:*:*:*:*:*:*4.0.0 betaVulnerableApache
  • cpe:2.3:a:apache:kylin:*:*:*:*:*:*:*:* Versions 2.0.0 – 2.6.6; 3.0.0 to before 3.1.3 Vulnerable ·Apache
  • cpe:2.3:a:apache:kylin:4.0.0:-:*:*:*:*:*:* Versions 4.0.0 Vulnerable ·Apache
  • cpe:2.3:a:apache:kylin:4.0.0:alpha:*:*:*:*:*:* Versions 4.0.0 alpha Vulnerable ·Apache
  • cpe:2.3:a:apache:kylin:4.0.0:beta:*:*:*:*:*:* Versions 4.0.0 beta Vulnerable ·Apache

Remediation

  • Fix · GHSA-q656-g2x3-8cgh org.apache.kylin:kylin (Maven) Fixed in 3.1.3 Advisory →
  • Fix · GHSA-q656-g2x3-8cgh org.apache.kylin:kylin (Maven) Fixed in 4.0.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-31522
  2. 2026-10-03 Alias added: GHSA-q656-g2x3-8cgh

References

Patch 2

Advisory 1

Other 3

  • 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
See all 23 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences