CVE-2026-59818
CVE-2026-59818 — etcd: gRPC client listener does not enforce `--client-crl-file` certificate revocation
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.
Published Updated Sources: cvelistV5, GitHub_M
Triage
Is it exploited, how likely is exploitation, what does it touch, and how severe do the scoring sources call it.
Exploitation
Unreported
no source claims exploitation
EPSS
0%
chance of exploitation in 30 days
CVSS base
6.5
MEDIUM
CISA SSVC assessment
Three decision points CISA publishes for the CVEs it assesses · SSVC 2.0.3. A stakeholder decision, not a severity score.
Exploitation
None
none · proof-of-concept · active
Automatable
No
can an attacker script all four kill-chain steps
Technical impact
Total
partial · total control of the vulnerable component
Affected scope
The catalog records vendors and products as separate lists, not pairs, so which product belongs to which vendor is not something this page can say.
Vendors (1)
Products (1)
Every base score collected
Sources score independently and disagree; each row says who scored it and under which version.
| Score | Version | Severity | Expl. | Impact | Source |
|---|---|---|---|---|---|
| 6.5 | CVSS 3.1 | MEDIUM | — | — | cvelistV5 |
Weakness & attack patterns
- CWE-295
References
9 on the record
- github.com/etcd-io/etcd/security/advisories/GHSA-3wh4-j44w-pg92
x_refsource_CONFIRM
- github.com/etcd-io/etcd/pull/22007
x_refsource_MISC
- github.com/etcd-io/etcd/pull/22021
x_refsource_MISC
- github.com/etcd-io/etcd/pull/22025
x_refsource_MISC
- github.com/etcd-io/etcd/commit/2308ce1578064641d4d67c40f0487309267d1bef
x_refsource_MISC
- github.com/etcd-io/etcd/commit/24838af5a53dd0245adced920e42a9bf0e7a267f
x_refsource_MISC
- github.com/etcd-io/etcd/commit/8221ae82bc25d4d55ca64382207b69be71038cbb
x_refsource_MISC
- github.com/etcd-io/etcd/releases/tag/v3.5.32
x_refsource_MISC
Elsewhere on this site
Not in any source we poll
Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.
- No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
- No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
- No exploit packet captures, log samples, or incident case IDs supplied.