Description
Envoy through 1.15.0 only considers the first value when multiple header values are present for some HTTP headers. Envoy’s setCopy() header map API does not replace all existing occurences of a non-inline header.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Service Mesh 1 | servicemesh-proxy | 1.1.9-1.el8 | RHSA-2020:4129 |
Advisories 1
- RHSA-2020:4129 Red Hat Security Advisory: Red Hat OpenShift Service Mesh 1.1 servicemesh-proxy security update Red Hat Security Advisories (RHSA) · Mar 18, 2026