CVE-2025-25294
Envoy Gateway Log Injection Vulnerability
Description
Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based application gateway. In all Envoy Gateway versions prior to 1.2.7 and 1.3.1 a default Envoy Proxy access log configuration is used. This format is vulnerable to log injection attacks. If the attacker uses a specially crafted user-agent which performs json injection, then he could add and overwrite fields to the access log. This vulnerability is fixed in 1.3.1 and 1.2.7. One can overwrite the old text based default format with JSON formatter by modifying the "EnvoyProxy.spec.telemetry.accessLog" setting.
How to fix CVE-2025-25294
To remediate CVE-2025-25294, upgrade the affected package to a fixed version below.
- —upgrade to 1.2.7 or later
- —upgrade to 1.2.7 or later
- —upgrade to 1.2.7 or later
Is CVE-2025-25294 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 1.2.7, >= 1.3.0, < 1.3.1
- from 0, < 1.2.7
- from 0, < 1.2.7, >= 1.3.0-rc.1, < 1.3.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |