CVE-2025-30373: Graylog

Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days.

Graylog is a free and open log management platform. Starting with 6.1, HTTP Inputs can be configured to check if a specified header is present and has a specified value to authenticate HTTP-based ingestion. Unfortunately, even though in cases of a missing header or a wrong value the correct HTTP response (401) is returned, the message will be ingested nonetheless. To mitigate the vulnerability, disable http-based inputs and allow only authenticated pull-based inputs. This vulnerability is fixed in 6.1.9.

Affected products

• Graylog Graylog: from 6.1.0, before 6.1.9 (fixed in 6.1.9)

Published 2025-04-07. Last modified 2026-06-17.