Description
Envoy is a cloud-native high-performance edge/middle/service proxy. In affected versions envoy does not properly handle http 1.1 non-101 1xx responses. This can lead to downstream failures in networked devices. This issue has been addressed in versions 1.31.5 and 1.32.3. Users are advised to upgrade. There are no known workarounds for this issue.
Scores
CVSS v3
7.1
EPSS
0.0003
EPSS Percentile
9.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-670
Status
published
Products (1)
envoyproxy/envoy
1.31.0 - 1.31.5
Published
Dec 18, 2024
Tracked Since
Feb 18, 2026