Server-Side Request Forgery (SSRF) Affecting ruby4.0-fluentd-1.19 package, versions <1.19.3-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-MINIMOSLATEST-RUBY40FLUENTD119-17663591
- published29 Jun 2026
- disclosed8 Jul 2026
Introduced: 29 Jun 2026
CVE-2026-44161 (opens in a new tab)How to fix?
Upgrade Minimos:latest ruby4.0-fluentd-1.19 to version 1.19.3-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream ruby4.0-fluentd-1.19 package and not the ruby4.0-fluentd-1.19 package as distributed by Minimos.
See How to fix? for Minimos:latest relevant fixed versions and status.
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.
References
- https://www.cve.org/CVERecord?id=CVE-2026-44161
- https://github.com/advisories/GHSA-72f5-rr8c-r6gr
- https://osv.dev/vulnerability/MINI-6r37-5x78-v6m4
- https://osv.dev/vulnerability/CVE-2026-44161
- https://github.com/fluent/fluentd/commit/c6a01ea2e0ea01977f8d615f7c6dbfae4cba88c9
- https://github.com/fluent/fluentd/pull/5394
- https://github.com/fluent/fluentd/releases/tag/v1.19.3
- https://github.com/fluent/fluentd/security/advisories/GHSA-72f5-rr8c-r6gr