CVE-2023-27491

MEDIUM

envoyproxy/envoy < 1.22.9 - HTTP Request Smuggling via Malformed Request Lines

Title source: llm
STIX 2.1

Description

Envoy is an open source edge and service proxy designed for cloud-native applications. Compliant HTTP/1 service should reject malformed request lines. Prior to versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, There is a possibility that non compliant HTTP/1 service may allow malformed requests, potentially leading to a bypass of security policies. This issue is fixed in versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9.

References (4)

Core 4
Core References

Scores

CVSS v3 5.4
EPSS 0.0087
EPSS Percentile 53.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-444 CWE-20
Status published
Products (1)
envoyproxy/envoy < 1.22.9
Published Apr 04, 2023
Tracked Since Feb 18, 2026