Server-side Request Forgery (SSRF) Affecting fluentd package, versions <1.19.3
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Start learning- Snyk IDSNYK-RUBY-FLUENTD-17660639
- published27 Jun 2026
- disclosed26 Jun 2026
- crediteverping
Introduced: 26 Jun 2026
NewCVE-2026-44161 (opens in a new tab)How to fix?
Upgrade fluentd to version 1.19.3 or higher.
Overview
Affected versions of this package are vulnerable to Server-side Request Forgery (SSRF) via the out_http process when untrusted user input is used in the endpoint configuration parameter. An attacker can cause the system to send HTTP requests to arbitrary internal services by manipulating placeholder values, potentially leading to unauthorized access to internal APIs, data exfiltration, or compromise of cloud metadata endpoints.
Workaround
This vulnerability can be mitigated by avoiding the use of dynamic hostnames in the endpoint parameter, restricting network access using firewall rules to block access to sensitive internal IP addresses, and explicitly filtering allowed hosts in placeholders.