CVE-2026-59818
published 2026-07-08CVE-2026-59818: 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…
PriorityP348high8.1CVSS 3.1
AVNACLPRLUINSUCHIHAN
EPSS
0.43%
36.2th percentile
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.
Affected
5 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| etcd-io | etcd | < 3.5.32 | 3.5.32 |
| etcd-io | etcd | — | — |
| etcd | etcd | < 3.5.32 | 3.5.32 |
| etcd | etcd | — | — |
| etcd | etcd | >= 3.6.0 < 3.6.13 | 3.6.13 |
CVSS provenance
nvdv3.18.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
vendor_redhat6.5MEDIUM
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VulDB
etcd-io etcd up to 3.5.31/3.6.12 gRPC Client Authentication certificate validation
vuldb·2026-07-09·CVSS 6.5
CVE-2026-59818 [MEDIUM] etcd-io etcd up to 3.5.31/3.6.12 gRPC Client Authentication certificate validation
A vulnerability categorized as problematic has been discovered in etcd-io etcd up to 3.5.31/3.6.12. The impacted element is an unknown function of the component gRPC Client Authentication Handler. Executing a manipulation can lead to improper certificate validation.
This vulnerability appears as CVE-2026-59818. The attack may be performed from remote. There is no available exploit.
Red Hat
etcd: etcd: Authentication bypass due to improper Certificate Revocation List enforcement on gRPC listener
vendor_redhat·2026-07-08·CVSS 6.5
CVE-2026-59818 [MEDIUM] CWE-295 etcd: etcd: Authentication bypass due to improper Certificate Revocation List enforcement on gRPC listener
etcd: etcd: Authentication bypass due to improper Certificate Revocation List enforcement on gRPC listener
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.
A flaw was found in etcd, a distributed key-value store. When etcd is configured to use separate listeners for HTTP and gRPC client endpoints, the Certificate Revocation List (CRL) is not properly enforced on the gRPC listener. This oversight
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-59818 etcd: etcd: Authentication bypass due to improper Certificate Revocation List enforcement on gRPC listener [fedora-all]
bugzilla·2026-07-09·CVSS 6.5
CVE-2026-59818 [MEDIUM] CVE-2026-59818 etcd: etcd: Authentication bypass due to improper Certificate Revocation List enforcement on gRPC listener [fedora-all]
CVE-2026-59818 etcd: etcd: Authentication bypass due to improper Certificate Revocation List enforcement on gRPC listener [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
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
Bugzilla
CVE-2026-59818 etcd: etcd: Authentication bypass due to improper Certificate Revocation List enforcement on gRPC listener
bugzilla·2026-07-08·CVSS 6.5
CVE-2026-59818 [MEDIUM] CVE-2026-59818 etcd: etcd: Authentication bypass due to improper Certificate Revocation List enforcement on gRPC listener
CVE-2026-59818 etcd: etcd: Authentication bypass due to improper Certificate Revocation List enforcement on gRPC listener
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.
https://github.com/etcd-io/etcd/commit/2308ce1578064641d4d67c40f0487309267d1befhttps://github.com/etcd-io/etcd/commit/24838af5a53dd0245adced920e42a9bf0e7a267fhttps://github.com/etcd-io/etcd/commit/8221ae82bc25d4d55ca64382207b69be71038cbbhttps://github.com/etcd-io/etcd/pull/22007https://github.com/etcd-io/etcd/pull/22021https://github.com/etcd-io/etcd/pull/22025https://github.com/etcd-io/etcd/releases/tag/v3.5.32https://github.com/etcd-io/etcd/releases/tag/v3.6.13https://github.com/etcd-io/etcd/security/advisories/GHSA-3wh4-j44w-pg92
2026-07-08
Published