CVE-2026-59818
etcd: gRPC client listener does not enforce `--client-crl-file` certificate revocation
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.
INFO
Published Date :
July 8, 2026, 9:16 p.m.
Last Modified :
July 8, 2026, 9:16 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-59818
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update etcd to version 3.5.32 or later.
- Update etcd to version 3.6.13 or later.
- Ensure CRL is enforced on gRPC listeners.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-59818.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-59818 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-59818
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-59818 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-59818 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Jul. 08, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'etcd-io', 'product': 'etcd', 'versions': [{'status': 'affected', 'version': '>= 3.6.0-alpha.0, < 3.6.13'}, {'status': 'affected', 'version': '< 3.5.32'}]}] Added 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. Added CVSS V3.1 AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N Added CWE CWE-295 Added Reference https://github.com/etcd-io/etcd/commit/2308ce1578064641d4d67c40f0487309267d1bef Added Reference https://github.com/etcd-io/etcd/commit/24838af5a53dd0245adced920e42a9bf0e7a267f Added Reference https://github.com/etcd-io/etcd/commit/8221ae82bc25d4d55ca64382207b69be71038cbb Added Reference https://github.com/etcd-io/etcd/pull/22007 Added Reference https://github.com/etcd-io/etcd/pull/22021 Added Reference https://github.com/etcd-io/etcd/pull/22025 Added Reference https://github.com/etcd-io/etcd/releases/tag/v3.5.32 Added Reference https://github.com/etcd-io/etcd/releases/tag/v3.6.13 Added Reference https://github.com/etcd-io/etcd/security/advisories/GHSA-3wh4-j44w-pg92