Which products and versions are affected by CVE-2021-45456?

Affected: Kylin (Apache) versions 4.0.0, 4.0.0-alpha, 4.0.0-beta, >= Apache Kylin 4 4.0.0; org.apache.kylin:kylin (maven). The full list is in the CVE brief.

Is CVE-2021-45456 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2021-45456 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2021-45456?

No public exploit code is known.

Is there a fix for CVE-2021-45456?

Fixed versions are available, including org.apache.kylin:kylin 4.0.1.

How urgently should CVE-2021-45456 be patched?

Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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Vulnerability Intelligence

CVE-2021-45456

Critical

Command Injection in Apache Kylin

Published Jan 8, 2022 · Updated Jul 9, 2026 · Also known as GHSA-hw3m-8h25-8frw

Key Facts

Patch immediately

CVE-2021-45456 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Kylin (Apache), org.apache.kylin:kylin (maven).
It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
EPSS estimates a 89% probability of exploitation in the next 30 days.
Fixed versions are available, including org.apache.kylin:kylin 4.0.1.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

CVSS v3.1

9.8

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS (30-day exploit likelihood)

89%

Higher than 99.7% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

None known

Get the full CVE-2021-45456 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

Apache kylin checks the legitimacy of the project before executing some commands with the project name passed in by the user. There is a mismatch between what is being checked and what is being used as the shell command argument in DiagnosisService. This may cause an illegal project name to pass the check and perform the following steps, resulting in a command injection vulnerability. This issue affects Apache Kylin 4.0.0.

Affected Products

5 affected entries in total

Product	Affected versions	Fixed in
KylinApache	4.0.0, 4.0.0-alpha, 4.0.0-beta, >= Apache Kylin 4 4.0.0	n/a
org.apache.kylin:kylinmaven	See advisory	4.0.1

Patched Releases

org.apache.kylin:kylin

4.0.1

Timeline

Publicly disclosed
Jan 8, 2022
Last updated
Jul 9, 2026

Weakness Type

CWE-77 Improper Neutralization of Special Elements used in a Command ('Command Injection')

References

2 more references in the full CVE brief

FAQ

Common Questions.

Apache kylin checks the legitimacy of the project before executing some commands with the project name passed in by the user.
Affected: Kylin (Apache) versions 4.0.0, 4.0.0-alpha, 4.0.0-beta, >= Apache Kylin 4 4.0.0; org.apache.kylin:kylin (maven). The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including org.apache.kylin:kylin 4.0.1.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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