HTTP Request Smuggling Affecting s3proxy-fips package, versions <3.3.0-r5


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.25% (17th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-S3PROXYFIPS-18310230
  • published26 Jul 2026
  • disclosed29 Jul 2026

Introduced: 26 Jul 2026

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

How to fix?

Upgrade Chainguard s3proxy-fips to version 3.3.0-r5 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream s3proxy-fips package and not the s3proxy-fips package as distributed by Chainguard. See How to fix? for Chainguard 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