HTTP Request Smuggling Affecting openshift-service-mesh/proxyv2-rhel9 package, versions *


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.3% (22nd percentile)

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  • Snyk IDSNYK-RHEL8-OPENSHIFTSERVICEMESHPROXYV2RHEL9-17810275
  • published3 Jul 2026
  • disclosed26 Jun 2026

Introduced: 26 Jun 2026

CVE-2026-48743  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:8 openshift-service-mesh/proxyv2-rhel9.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openshift-service-mesh/proxyv2-rhel9 package and not the openshift-service-mesh/proxyv2-rhel9 package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.35.11, 1.36.7, 1.37.3, and 1.38.1, Envoy can translate a downstream HTTP/3 request that is complete at the transport layer (HEADERS with FIN / headers-only close) but still carries a nonzero Content-Length into a complete upstream HTTP/1 request with unresolved body debt. In an HTTP/1 upstream deployment where the origin replies before reading the declared body and keeps the connection reusable, the beginning of the next Envoy-generated upstream request can be consumed as the first request's body. The remaining bytes are then parsed by the origin as a new HTTP/1 request. This was reproduced as a route-bypass/desync: direct /pwn was denied by Envoy, but the second downstream H3 stream received the response for backend-parsed GET /pwn HTTP/1.1. This vulnerability is fixed in 1.35.11, 1.36.7, 1.37.3, and 1.38.1.

CVSS Base Scores

version 3.1