Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Etcd | Etcd | < 3.5.32 |
Related Weaknesses (CWE)
References
- 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/22007Issue TrackingPatch
- https://github.com/etcd-io/etcd/pull/22021Issue TrackingPatch
- https://github.com/etcd-io/etcd/pull/22025Issue TrackingPatch
- https://github.com/etcd-io/etcd/releases/tag/v3.5.32ProductRelease Notes
- https://github.com/etcd-io/etcd/releases/tag/v3.6.13ProductRelease Notes
- https://github.com/etcd-io/etcd/security/advisories/GHSA-3wh4-j44w-pg92MitigationVendor Advisory
FAQ
What is CVE-2026-59818?
CVE-2026-59818 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 o...
How severe is CVE-2026-59818?
CVE-2026-59818 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-59818?
Check the references section above for vendor advisories and patch information. Affected products include: Etcd Etcd.