CVE-2025-37730
Logstash Improper Certificate Validation in TCP output
6.5
MEDIUM
CVSS 3.1
EPSS 0.14%
Description
Improper certificate validation in Logstash's TCP output could lead to a man-in-the-middle (MitM) attack in “client” mode, as hostname verification in TCP output was not being performed when the ssl_verification_mode => full was set.
How to fix CVE-2025-37730
To remediate CVE-2025-37730, upgrade the affected package to a fixed version below.
- —upgrade to 8.18.1 or later
Is CVE-2025-37730 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 8.0.0, < 8.18.1, >= 9.0.0, < 9.0.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N |