CVE-2026-59818
etcd: gRPC client listener does not enforce `--client-crl-file` certificate revocation
8.1
HIGH
CVSS 3.1
EPSS 0.32%
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.
How to fix CVE-2026-59818
To remediate CVE-2026-59818, upgrade the affected package to a fixed version below.
- —upgrade to 3.5.32 or later
- —no fix listed
Is CVE-2026-59818 being exploited?
Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 3.5.32, >= 3.6.0, < 3.6.13
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |