CVE-2020-1956

Command Injection in Kylin

8.8 HighIn KEVPublic exploitFix available

Apache Kylin 2.3.0, and releases up to 2.6.5 and 3.0.1 has some restful apis which will concatenate os command with the user input string, a user is likely to be able to execute any os command without any protection or validation.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

97.4%Up 92.0 points since Apr 14, 2021

What each source reports

NVD Score used 8.8

Record: CVE-2020-1956
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 9.0 HighAV:N/AC:L/Au:S/C:C/I:C/A:C
Weakness: CWE-78
Updated: 2026-11-02

CVE List 8.8

Record: CVE-2020-1956
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-78
Updated: 2026-11-02

EUVDEUVD-2020-0557 8.8

Record: EUVD-2020-0557
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-gprm-xqrc-c2j3 8.8

Command Injection in Kylin

Kylin has some restful apis which will concatenate os command with the user input string, a user is likely to be able to execute any os command without any protection or validation.

Record: GHSA-gprm-xqrc-c2j3
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:H
Weakness: CWE-78
Updated: 2026-11-02

CISA KEV No score

Apache Kylin OS Command Injection Vulnerability

Apache Kylin contains an OS command injection vulnerability which could permit an attacker to perform remote code execution.

Record: CVE-2020-1956
Weakness: CWE-78
Updated: 2026-11-02

OSV 8.8

Record: CVE-2020-1956
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVGHSA-gprm-xqrc-c2j3 8.8

Command Injection in Kylin

Kylin has some restful apis which will concatenate os command with the user input string, a user is likely to be able to execute any os command without any protection or validation.

Record: GHSA-gprm-xqrc-c2j3
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:H
Weakness: CWE-78
Updated: 2026-11-02

Affected products

apache kylin

Affected packages

Affected packages
Package	Affected	Fixed
`org.apache.kylin:kylin-core-common` Maven	before 2.6.6	2.6.6
`org.apache.kylin:kylin-core-common` Maven	3.0.0 up to 3.0.2	3.0.2
`org.apache.kylin:kylin-core-common` Maven	before 2.6.6, plus listed versions 1.5.01.5.11.5.21.5.2.11.5.3 Show 20 moreShow less 1.5.41.5.4.11.6.02.0.02.1.02.2.02.3.02.3.12.3.22.4.02.4.12.5.02.5.12.5.22.6.02.6.12.6.22.6.32.6.42.6.5	2.6.6
`org.apache.kylin:kylin-core-common` Maven	3.0.0 up to 3.0.2, plus listed versions 3.0.1	3.0.2

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
PoC in GitHub	b510/CVE-2020-1956	2021-07-08
Nuclei	Apache Kylin 3.0.1 - Command Injection Vulnerability

History

History
Recorded	Changed	Sources
Nov 3, 2026	exploitation, exploits
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, CISA KEV, Nuclei, NVD, OSV, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-1956 is a high vulnerability (CVSS 8.8) in Apache Kylin, published May 22, 2020. CISA lists it as known to be exploited, since March 25, 2022. EUVD reports exploitation since March 25, 2022. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 97.4%, the 99th percentile. Fixed in org.apache.kylin:kylin-core-common 2.6.6.

References

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