CVE-2026-33466

Improper Limitation of a Pathname to a Restricted Directory (CWE-22) in Logstash can lead to arbitrary file write and potentially remote code execution via Relative Path Traversal (CAPEC-139). The archive extraction utilities used by Logstash do not properly validate file paths within compressed archives. An attacker who can serve a specially crafted archive to Logstash through a compromised or attacker-controlled update endpoint can write arbitrary files to the host filesystem with the privileges of the Logstash process. In certain configurations where automatic pipeline reloading is enabled, this can be escalated to remote code execution.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://discuss.elastic.co/t/logstash-8-19-14-9-2-8-9-3-3-security-update-esa-2026-29/385816	Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:elastic:logstash::::::::
	cpe:2.3:a:elastic:logstash::::::::
	cpe:2.3:a:elastic:logstash::::::::

History

21 Apr 2026, 23:14

Type	Values Removed	Values Added
First Time		Elastic Elastic logstash
CPE		cpe:2.3:a:elastic:logstash::::::::
References	~~() https://discuss.elastic.co/t/logstash-8-19-14-9-2-8-9-3-3-security-update-esa-2026-29/385816 -~~	() https://discuss.elastic.co/t/logstash-8-19-14-9-2-8-9-3-3-security-update-esa-2026-29/385816 - Mitigation, Vendor Advisory

08 Apr 2026, 18:26

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-08 18:26

Updated : 2026-04-21 23:14

NVD link : CVE-2026-33466

Mitre link : CVE-2026-33466

CVE.ORG link : CVE-2026-33466

JSON object : View

Products Affected

elastic

logstash

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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