CVE-2025-37730
Medium
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.
SeverityMedium
CVSS6.5
Exploit probability—
ProductLogstash
PublishedMay 6, 2025
First seenMay 6, 2025
Weakness typeCWE-295CWE-295
How to fix
Update
- Elastic Logstash8.17.6, 8.18.1, 9.0.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Elastic Logstash | 8.0.0 ≤ v < 8.17.6, 8.18.0 ≤ v < 8.18.1, 9.0.0 ≤ v < 9.0.1 | 8.17.6, 8.18.1, 9.0.1 |
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