Vulnerability Report

CVE-2026-44161

Title: SSRF in Fluentd out_http plugin

SSRF

Proof Of Concept

No public PoC currently indexed for CVE-2026-44161.

CWE Category CWE-918

Published Date Jul 08, 2026

Modified Date Jul 13, 2026

Exploit Status Not Found

Score 7.2 CVSS v3.1

Exploit Probability (EPSS)

0.31%

Vulnerability Summary

CVE-2026-44161: 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.

Impacted Vendors

fluentd 1

Reference Links

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

CVSS v3.1

Source Entity [email protected]

Severity HIGH

7.2

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

CHANGED

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

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-44161 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

July 13, 2026 MODIFIED

Vulnerability data updated via NVD.

July 10, 2026 MODIFIED

Vulnerability data updated via NVD.

July 09, 2026 MODIFIED

Vulnerability data updated via NVD.

July 08, 2026 MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


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

Affected Stack

No specific products linked.