HTTP Request Smuggling Affecting logstash-input-http package, versions <4.1.12-r0


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.27% (19th percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-LOGSTASHINPUTHTTP-18302501
  • published25 Jul 2026
  • disclosed29 Jul 2026

Introduced: 25 Jul 2026

NewCVE-2026-59898  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

Upgrade Minimos:latest logstash-input-http to version 4.1.12-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream logstash-input-http package and not the logstash-input-http package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, ab attacker can force WebSocket upgrade via the lax V07 (or V08) handshaker by sending Sec-WebSocket-Version: 7 and omitting Connection: Upgrade / Upgrade: websocket headers, completing a protocol switch that a proxy would not recognize as an Upgrade request and enabling HTTP request smuggling / protocol-confusion attacks. This issue has been fixed in versions 4.1.136.Final and 4.2.16.Final.

CVSS Base Scores

version 3.1