CVE-2026-59818
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.43%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 8.1 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- EPSS
- 0.43% probability · 36th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-295
- Affected
- etcd/etcd
- Source
- security-advisories@github.com
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 Tracking, Patch
- https://github.com/etcd-io/etcd/pull/22021Issue Tracking, Patch
- https://github.com/etcd-io/etcd/pull/22025Issue Tracking, Patch
- https://github.com/etcd-io/etcd/releases/tag/v3.5.32Product, Release Notes
- https://github.com/etcd-io/etcd/releases/tag/v3.6.13Product, Release Notes
- https://github.com/etcd-io/etcd/security/advisories/GHSA-3wh4-j44w-pg92Mitigation, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.