CVE-2026-59818: Etcd

High severity, CVSS 8.1. EPSS: 0.4% chance of exploitation in the next 30 days.

etcd is a distributed key-value store for the data of a distributed system. Prior to 3.5.32 and 3.6.13, when etcd is configured with --listen-client-http-urls to split HTTP and gRPC client endpoints onto separate listeners, the --client-crl-file Certificate Revocation List is not enforced on the gRPC listener, allowing a client with a revoked certificate to authenticate successfully over gRPC. This issue is fixed in versions 3.5.32 and 3.6.13.

Affected products

• Etcd Etcd: before 3.5.32 (fixed in 3.5.32); from 3.6.0, before 3.6.13 (fixed in 3.6.13)

Published 2026-07-08. Last modified 2026-07-13.