HTTP Request Smuggling Affecting nginx package, versions [1.25.0,1.30.6)[1.31.0,1.31.7)


Severity

Recommended
0.0
medium
0
10

CVSS assessment by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.35% (28th percentile)

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  • Snyk IDSNYK-UNMANAGED-NGINX-21691943
  • published24 Oct 2026
  • disclosed14 Oct 2026
  • creditUnknown

Introduced: 14 Oct 2026

NewCVE-2026-95101  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

Upgrade nginx to version 1.30.6, 1.31.7 or higher.

Overview

Affected versions of this package are vulnerable to HTTP Request Smuggling in the ngx_http_v3_module when HTTP/3 is used with proxy_request_buffering enabled. An attacker can manipulate data sent to backend servers by injecting arbitrary content into proxied requests. This is only exploitable if HTTP/3 is enabled and the proxy_request_buffering directive is set to 'on'.

CVSS Base Scores

version 4.0
version 3.1