CVE-2026-31838

CVE-2026-31838 describes a vulnerability in Istio where an Envoy RBAC header matching could bypass authorization when policies rely on HTTP headers with multiple values. Affected are Istio deployments using Envoy before versions 1.29.1, 1.28.5, or 1.27.8. An attacker could craft requests with mul...

CVE-2026-26308

Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13, the Envoy RBAC Role-Based Access Control filter contains a logic vulnerability in how it validates HTTP headers when multiple values are present for the same header name. Instead of validating eac...

SUSE CVE-2020-25017

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...