Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2026-07-14 15:42

Modified

2026-09-08 08:34

Summary

etcd: gRPC client listener does not enforce `--client-crl-file` certificate revocation

Details

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.

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "etcd",
        "purl": "pkg:bitnami/etcd"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.5.32"
            },
            {
              "introduced": "3.6.0"
            },
            {
              "fixed": "3.6.13"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-59818"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:etcd:etcd:*:*:*:*:*:go:*:*"
    ],
    "severity": "High"
  },
  "details": "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.",
  "id": "BIT-etcd-2026-59818",
  "modified": "2026-09-08T08:34:36.952Z",
  "published": "2026-07-14T15:42:36.975Z",
  "references": [
    {
      "type": "FIX",
      "url": "https://github.com/etcd-io/etcd/commit/2308ce1578064641d4d67c40f0487309267d1bef"
    },
    {
      "type": "FIX",
      "url": "https://github.com/etcd-io/etcd/commit/24838af5a53dd0245adced920e42a9bf0e7a267f"
    },
    {
      "type": "FIX",
      "url": "https://github.com/etcd-io/etcd/commit/8221ae82bc25d4d55ca64382207b69be71038cbb"
    },
    {
      "type": "FIX",
      "url": "https://github.com/etcd-io/etcd/pull/22007"
    },
    {
      "type": "FIX",
      "url": "https://github.com/etcd-io/etcd/pull/22021"
    },
    {
      "type": "FIX",
      "url": "https://github.com/etcd-io/etcd/pull/22025"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/etcd-io/etcd/releases/tag/v3.5.32"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/etcd-io/etcd/releases/tag/v3.6.13"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/etcd-io/etcd/security/advisories/GHSA-3wh4-j44w-pg92"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59818"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "etcd: gRPC client listener does not enforce `--client-crl-file` certificate revocation"
}

CVE-2026-59818 (GCVE-0-2026-59818)

Vulnerability from cvelistv5 – Published: 2026-07-08 21:00 – Updated: 2026-07-09 13:13

Title

etcd: gRPC client listener does not enforce `--client-crl-file` certificate revocation

Summary

Severity

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-09 13:13 UTC

CWE

CWE-295 - Improper Certificate Validation

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7659 records in the last 180 days details

References

9 references

URL	Tags
https://github.com/etcd-io/etcd/security/advisori…	x_refsource_CONFIRM
https://github.com/etcd-io/etcd/pull/22007	x_refsource_MISC
https://github.com/etcd-io/etcd/pull/22021	x_refsource_MISC
https://github.com/etcd-io/etcd/pull/22025	x_refsource_MISC
https://github.com/etcd-io/etcd/commit/2308ce1578…	x_refsource_MISC
https://github.com/etcd-io/etcd/commit/24838af5a5…	x_refsource_MISC
https://github.com/etcd-io/etcd/commit/8221ae82bc…	x_refsource_MISC
https://github.com/etcd-io/etcd/releases/tag/v3.5.32	x_refsource_MISC
https://github.com/etcd-io/etcd/releases/tag/v3.6.13	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
etcd-io	etcd	Affected: >= 3.6.0-alpha.0, < 3.6.13 Affected: < 3.5.32

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-59818",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-09T13:13:02.654220Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-09T13:13:10.463Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "etcd",
          "vendor": "etcd-io",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 3.6.0-alpha.0, \u003c 3.6.13"
            },
            {
              "status": "affected",
              "version": "\u003c 3.5.32"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "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",
              "description": "CWE-295: Improper Certificate Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-08T21:00:18.207Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/etcd-io/etcd/security/advisories/GHSA-3wh4-j44w-pg92",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/etcd-io/etcd/security/advisories/GHSA-3wh4-j44w-pg92"
        },
        {
          "name": "https://github.com/etcd-io/etcd/pull/22007",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/etcd-io/etcd/pull/22007"
        },
        {
          "name": "https://github.com/etcd-io/etcd/pull/22021",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/etcd-io/etcd/pull/22021"
        },
        {
          "name": "https://github.com/etcd-io/etcd/pull/22025",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/etcd-io/etcd/pull/22025"
        },
        {
          "name": "https://github.com/etcd-io/etcd/commit/2308ce1578064641d4d67c40f0487309267d1bef",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/etcd-io/etcd/commit/2308ce1578064641d4d67c40f0487309267d1bef"
        },
        {
          "name": "https://github.com/etcd-io/etcd/commit/24838af5a53dd0245adced920e42a9bf0e7a267f",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/etcd-io/etcd/commit/24838af5a53dd0245adced920e42a9bf0e7a267f"
        },
        {
          "name": "https://github.com/etcd-io/etcd/commit/8221ae82bc25d4d55ca64382207b69be71038cbb",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/etcd-io/etcd/commit/8221ae82bc25d4d55ca64382207b69be71038cbb"
        },
        {
          "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/v3.5.32"
        },
        {
          "name": "https://github.com/etcd-io/etcd/releases/tag/v3.6.13",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/etcd-io/etcd/releases/tag/v3.6.13"
        }
      ],
      "source": {
        "advisory": "GHSA-3wh4-j44w-pg92",
        "discovery": "UNKNOWN"
      },
      "title": "etcd: gRPC client listener does not enforce `--client-crl-file` certificate revocation"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-59818",
    "datePublished": "2026-07-08T21:00:18.207Z",
    "dateReserved": "2026-07-07T15:00:50.978Z",
    "dateUpdated": "2026-07-09T13:13:10.463Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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