CVE-2026-59818

EUVD-2026-42426
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.5 MEDIUM
NETWORK
LOW
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 24.88%
Affected Products (NVD)
VendorProductVersion
etcdetcd
𝑥
< 3.5.32
etcdetcd
3.6.0 ≤
𝑥
< 3.6.13
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
etcd
bookworm
3.4.23-4
fixed
bullseye
3.3.25+dfsg-6
fixed
forky
vulnerable
sid
vulnerable
trixie
no-dsa
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
etcd
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
questing
ignored
resolute
needs-triage
xenial
needs-triage
Azure Linux logo
Azure Linux Releases
Azure Package
Release
etcd
Azure Linux 3.0
0:3.5.33-1.azl3
fixed
Common Weakness Enumeration
References
https://github.com/etcd-io/etcd/commit/2308ce1578064641d4d67c40f0487309267d1bef
https://github.com/etcd-io/etcd/commit/24838af5a53dd0245adced920e42a9bf0e7a267f
https://github.com/etcd-io/etcd/commit/8221ae82bc25d4d55ca64382207b69be71038cbb
https://github.com/etcd-io/etcd/pull/22007
https://github.com/etcd-io/etcd/pull/22021
https://github.com/etcd-io/etcd/pull/22025
https://github.com/etcd-io/etcd/releases/tag/v3.5.32
https://github.com/etcd-io/etcd/releases/tag/v3.6.13
https://github.com/etcd-io/etcd/security/advisories/GHSA-3wh4-j44w-pg92