CVE-2026-59818
MEDIUM severity · CVSS 6.5 · CWE-295
6.5CVSS MEDIUM
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredHigh
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactNone
Exploit probability (EPSS)0%
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Official patch: https://github.com/etcd-io/etcd/commit/2308ce1578064641d4d67c40f0487309267d1bef ↗
Additional information
- NVD record
- https://github.com/etcd-io/etcd/commit/2308ce1578064641d4d67c40f0487309267d1befPatch
- https://github.com/etcd-io/etcd/commit/24838af5a53dd0245adced920e42a9bf0e7a267fPatch
- https://github.com/etcd-io/etcd/commit/8221ae82bc25d4d55ca64382207b69be71038cbbPatch
- https://github.com/etcd-io/etcd/pull/22007Patch
- https://github.com/etcd-io/etcd/pull/22021Patch
- https://github.com/etcd-io/etcd/pull/22025Patch
- https://github.com/etcd-io/etcd/releases/tag/v3.5.32
- https://github.com/etcd-io/etcd/releases/tag/v3.6.13