CVE-2026-44161

Published: Jul 8, 2026Modified: Jul 13, 2026

7.2

Vector

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

Exploitability: 3.9 / Impact: 2.7

Source: security-advisories@github.com (Secondary)

Description

Fluentd collects events from various data sources and writes them to files, RDBMS, NoSQL, IaaS, SaaS, Hadoop and so on. Prior to 1.19.3, the Fluentd out_http output plugin allows placeholders such as ${tag} in the endpoint configuration parameter, and if a placeholder value is derived from untrusted input an attacker can control the destination hostname of outbound HTTP requests and force requests to arbitrary internal services. This issue is fixed in version 1.19.3.

Affected (1)

Products: Fluentd: Fluentd

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Fluentd Fluentd	Before 1.19.3

Related CWEs

Server-Side Request Forgery (SSRF)

The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

References (4)

https://github.com/fluent/fluentd/commit/c6a01ea2e0ea01977f8d615f7c6dbfae4cba88c9

Source: security-advisories@github.com

Patch

https://github.com/fluent/fluentd/pull/5394

Source: security-advisories@github.com

Issue TrackingPatch

https://github.com/fluent/fluentd/releases/tag/v1.19.3

Source: security-advisories@github.com

ProductRelease Notes

https://github.com/fluent/fluentd/security/advisories/GHSA-72f5-rr8c-r6gr

Source: security-advisories@github.com

MitigationVendor Advisory

Timeline

No history available yet.