Description
Envoy is a cloud-native high-performance edge/middle/service proxy. A vulnerability has been identified in Envoy that allows malicious attackers to inject unexpected content into access logs. This is achieved by exploiting the lack of validation for the `REQUESTED_SERVER_NAME` field for access loggers. This issue has been addressed in versions 1.31.2, 1.30.6, 1.29.9, and 1.28.7. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| envoyproxy | envoy | >= 1.31.0, < 1.31.2, >= 1.30.0, < 1.30.6, >= 1.29.0, < 1.29.9, < 1.28.7 | — |
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.
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | ecs-service-connect-agent | v1.29.9.0-1.amzn2023 | ALAS2023-2026-1603 |
Advisories 1
- ALAS2023-2026-1603 Moderate: ecs-service-connect-agent security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · May 1, 2026