{"id":"CVE-2026-59818","state":"PUBLISHED","title":"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.","publishedAt":"2026-07-08T21:00:18.207Z","updatedAt":"2026-07-09T13:13:10.463Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["etcd-io etcd"],"affected":[{"vendor":"etcd-io","product":"etcd","versions":[{"version":">= 3.6.0-alpha.0, < 3.6.13","status":"affected"},{"version":"< 3.5.32","status":"affected"}]}],"references":["https://github.com/etcd-io/etcd/security/advisories/GHSA-3wh4-j44w-pg92","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/commit/2308ce1578064641d4d67c40f0487309267d1bef","https://github.com/etcd-io/etcd/commit/24838af5a53dd0245adced920e42a9bf0e7a267f","https://github.com/etcd-io/etcd/commit/8221ae82bc25d4d55ca64382207b69be71038cbb","https://github.com/etcd-io/etcd/releases/tag/v3.5.32","https://github.com/etcd-io/etcd/releases/tag/v3.6.13"],"weaknesses":["CWE-295"],"ingestedAt":"2026-10-29T20:12:32.778Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/59xxx/CVE-2026-59818.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-59818","state":"PUBLISHED","datePublished":"2026-07-08T21:00:18.207Z","dateUpdated":"2026-07-09T13:13:10.463Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-07-07T15:00:50.978Z"},"containers":{"cna":{"title":"etcd: gRPC client listener does not enforce `--client-crl-file` certificate revocation","descriptions":[{"lang":"en","value":"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":[{"vendor":"etcd-io","product":"etcd","versions":[{"version":">= 3.6.0-alpha.0, < 3.6.13","status":"affected"},{"version":"< 3.5.32","status":"affected"}]}],"references":[{"url":"https://github.com/etcd-io/etcd/security/advisories/GHSA-3wh4-j44w-pg92","name":"https://github.com/etcd-io/etcd/security/advisories/GHSA-3wh4-j44w-pg92","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/etcd-io/etcd/pull/22007","name":"https://github.com/etcd-io/etcd/pull/22007","tags":["x_refsource_MISC"]},{"url":"https://github.com/etcd-io/etcd/pull/22021","name":"https://github.com/etcd-io/etcd/pull/22021","tags":["x_refsource_MISC"]},{"url":"https://github.com/etcd-io/etcd/pull/22025","name":"https://github.com/etcd-io/etcd/pull/22025","tags":["x_refsource_MISC"]},{"url":"https://github.com/etcd-io/etcd/commit/2308ce1578064641d4d67c40f0487309267d1bef","name":"https://github.com/etcd-io/etcd/commit/2308ce1578064641d4d67c40f0487309267d1bef","tags":["x_refsource_MISC"]},{"url":"https://github.com/etcd-io/etcd/commit/24838af5a53dd0245adced920e42a9bf0e7a267f","name":"https://github.com/etcd-io/etcd/commit/24838af5a53dd0245adced920e42a9bf0e7a267f","tags":["x_refsource_MISC"]},{"url":"https://github.com/etcd-io/etcd/commit/8221ae82bc25d4d55ca64382207b69be71038cbb","name":"https://github.com/etcd-io/etcd/commit/8221ae82bc25d4d55ca64382207b69be71038cbb","tags":["x_refsource_MISC"]},{"url":"https://github.com/etcd-io/etcd/releases/tag/v3.5.32","name":"https://github.com/etcd-io/etcd/releases/tag/v3.5.32","tags":["x_refsource_MISC"]},{"url":"https://github.com/etcd-io/etcd/releases/tag/v3.6.13","name":"https://github.com/etcd-io/etcd/releases/tag/v3.6.13","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"HIGH","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-295","lang":"en","description":"CWE-295: Improper Certificate Validation","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-08T21:00:18.207Z"},"source":{"advisory":"GHSA-3wh4-j44w-pg92","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-09T13:13:02.654220Z","id":"CVE-2026-59818","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-09T13:13:10.463Z"}}]}}}