CVE-2026-44161 | THREATINT

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.

PUBLISHED Reserved 2026-05-05 | Published 2026-07-08 | Updated 2026-07-09 | Assigner GitHub_M

HIGH: 7.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:L

Problem types

CWE-918: Server-Side Request Forgery (SSRF)

Product status

< 1.19.3

affected

References

github.com/...luentd/security/advisories/GHSA-72f5-rr8c-r6gr

github.com/fluent/fluentd/pull/5394

github.com/...ommit/c6a01ea2e0ea01977f8d615f7c6dbfae4cba88c9

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

cve.org (CVE-2026-44161)

nvd.nist.gov (CVE-2026-44161)

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