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.

An update of the etcd package has been released.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-59818)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
375618	Photon OS 5.0: Etcd PHSA-2026-5.0-92-0975	Nessus	PhotonOS Local Security Checks	Local	high
374984	Photon OS 5.0: Etcd PHSA-2026-5.0-91-0975	Nessus	PhotonOS Local Security Checks	Local	high
326076	Linux Distros Unpatched Vulnerability : CVE-2026-59818	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-59818

high

Tenable Plugins

high

high

high