CVE-2026-44161

HIGH
MEDIUM Priority: 0.03 BB Relevance: 74/100
Published: 2026-07-08 Modified: 2026-10-25 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction Scope Change

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Changed
C: Low
I: None
A: Low

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.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
fluentd fluentd < 1.19.3

Bug Bounty Relevance

74 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

7.2 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:L

EPSS — Exploitation Probability

0.44%
Raw Score 0.004420
Percentile 38.3%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00442
2026-10-28
0.00442

Intelligence Sources

nvd ref →