Vulnerability-Lookup

ubuntu-cve-2026-73499

Vulnerability from osv_ubuntu

Published

2026-08-13 00:00

Modified

2026-08-13 00:00

Summary

Details

etcd is a distributed key-value store for the data of a distributed system. Prior to versions 3.5.33, 3.6.14, and 3.7.1, a user granted READ permission on a single exact key can use the Watch gRPC API with clientv3.WithFromKey() to receive watch events for every key lexicographically greater than or equal to the permitted key. In server/etcdserver/api/v3rpc/watch.go, the open-ended RangeEnd sentinel is rewritten before the RBAC permission check in server/auth/range_perm_cache.go function isRangeOpPermitted, causing the request to be treated as an exact-key watch. Range/Get and DeleteRange requests are not affected, and the issue affects only clusters with authentication enabled. This issue is fixed in versions 3.5.33, 3.6.14, and 3.7.1.

Severity

7.1 (High)


                    
                      CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-73499	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-73499	REPORT
	https://github.com/etcd-io/etcd/security/advisori…	REPORT
	https://github.com/etcd-io/etcd/commit/6643f80602…	REPORT
	https://github.com/etcd-io/etcd/commit/7cf71ec9e2…	REPORT
	https://github.com/etcd-io/etcd/commit/afeaa624da…	REPORT
	https://github.com/etcd-io/etcd/commit/e863b001bb…	REPORT
	https://github.com/etcd-io/etcd/releases/tag/v3.5.33	REPORT
	https://github.com/etcd-io/etcd/releases/tag/v3.6.14	REPORT
	https://github.com/etcd-io/etcd/releases/tag/v3.7.1	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "etcd",
            "binary_version": "2.2.5+dfsg-1ubuntu1"
          },
          {
            "binary_name": "golang-etcd-server-dev",
            "binary_version": "2.2.5+dfsg-1ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "etcd",
        "purl": "pkg:deb/ubuntu/etcd@2.2.5+dfsg-1ubuntu1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.2.0+dfsg-2",
        "2.2.1+dfsg-1",
        "2.2.2+dfsg-1",
        "2.2.2+dfsg-2",
        "2.2.3+dfsg-1",
        "2.2.5+dfsg-1",
        "2.2.5+dfsg-1ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "etcd",
            "binary_version": "3.2.17+dfsg-1ubuntu0.1+esm2"
          },
          {
            "binary_name": "etcd-client",
            "binary_version": "3.2.17+dfsg-1ubuntu0.1+esm2"
          },
          {
            "binary_name": "etcd-server",
            "binary_version": "3.2.17+dfsg-1ubuntu0.1+esm2"
          },
          {
            "binary_name": "golang-etcd-server-dev",
            "binary_version": "3.2.17+dfsg-1ubuntu0.1+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "etcd",
        "purl": "pkg:deb/ubuntu/etcd@3.2.17+dfsg-1ubuntu0.1+esm2?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1.0-1",
        "3.2.9+dfsg-2",
        "3.2.9+dfsg-3",
        "3.2.17+dfsg-1",
        "3.2.17+dfsg-1ubuntu0.1~esm1",
        "3.2.17+dfsg-1ubuntu0.1",
        "3.2.17+dfsg-1ubuntu0.1+esm1",
        "3.2.17+dfsg-1ubuntu0.1+esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "etcd",
            "binary_version": "3.2.26+dfsg-6ubuntu0.2+esm1"
          },
          {
            "binary_name": "etcd-client",
            "binary_version": "3.2.26+dfsg-6ubuntu0.2+esm1"
          },
          {
            "binary_name": "etcd-server",
            "binary_version": "3.2.26+dfsg-6ubuntu0.2+esm1"
          },
          {
            "binary_name": "golang-etcd-server-dev",
            "binary_version": "3.2.26+dfsg-6ubuntu0.2+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "etcd",
        "purl": "pkg:deb/ubuntu/etcd@3.2.26+dfsg-6ubuntu0.2+esm1?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.2.26+dfsg-3",
        "3.2.26+dfsg-4",
        "3.2.26+dfsg-6",
        "3.2.26+dfsg-6ubuntu0.1",
        "3.2.26+dfsg-6ubuntu0.2",
        "3.2.26+dfsg-6ubuntu0.2+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "etcd",
            "binary_version": "3.3.25+dfsg-7ubuntu0.22.04.2+esm3"
          },
          {
            "binary_name": "etcd-client",
            "binary_version": "3.3.25+dfsg-7ubuntu0.22.04.2+esm3"
          },
          {
            "binary_name": "etcd-server",
            "binary_version": "3.3.25+dfsg-7ubuntu0.22.04.2+esm3"
          },
          {
            "binary_name": "golang-etcd-server-dev",
            "binary_version": "3.3.25+dfsg-7ubuntu0.22.04.2+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "etcd",
        "purl": "pkg:deb/ubuntu/etcd@3.3.25+dfsg-7ubuntu0.22.04.2+esm3?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.3.25+dfsg-6",
        "3.3.25+dfsg-7",
        "3.3.25+dfsg-7ubuntu0.22.04.1",
        "3.3.25+dfsg-7ubuntu0.22.04.1+esm1",
        "3.3.25+dfsg-7ubuntu0.22.04.2",
        "3.3.25+dfsg-7ubuntu0.22.04.2+esm1",
        "3.3.25+dfsg-7ubuntu0.22.04.2+esm2",
        "3.3.25+dfsg-7ubuntu0.22.04.2+esm3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "etcd-client",
            "binary_version": "3.4.30-1ubuntu0.24.04.3+esm2"
          },
          {
            "binary_name": "etcd-server",
            "binary_version": "3.4.30-1ubuntu0.24.04.3+esm2"
          },
          {
            "binary_name": "golang-etcd-server-dev",
            "binary_version": "3.4.30-1ubuntu0.24.04.3+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:24.04:LTS",
        "name": "etcd",
        "purl": "pkg:deb/ubuntu/etcd@3.4.30-1ubuntu0.24.04.3+esm2?arch=source\u0026distro=esm-apps/noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.4.23-4ubuntu2",
        "3.4.30-1",
        "3.4.30-1build1",
        "3.4.30-1ubuntu0.24.04.1",
        "3.4.30-1ubuntu0.24.04.2",
        "3.4.30-1ubuntu0.24.04.2+esm1",
        "3.4.30-1ubuntu0.24.04.3",
        "3.4.30-1ubuntu0.24.04.3+esm1",
        "3.4.30-1ubuntu0.24.04.3+esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "etcd-client",
            "binary_version": "3.5.16-10ubuntu0.26.04.1~esm1"
          },
          {
            "binary_name": "etcd-server",
            "binary_version": "3.5.16-10ubuntu0.26.04.1~esm1"
          },
          {
            "binary_name": "golang-etcd-server-dev",
            "binary_version": "3.5.16-10ubuntu0.26.04.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:26.04:LTS",
        "name": "etcd",
        "purl": "pkg:deb/ubuntu/etcd@3.5.16-10ubuntu0.26.04.1~esm1?arch=source\u0026distro=esm-apps/resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.5.16-4",
        "3.5.16-10",
        "3.5.16-10ubuntu0.26.04.1~esm1"
      ]
    }
  ],
  "aliases": [],
  "details": "etcd is a distributed key-value store for the data of a distributed system. Prior to versions 3.5.33, 3.6.14, and 3.7.1, a user granted READ permission on a single exact key can use the Watch gRPC API with clientv3.WithFromKey() to receive watch events for every key lexicographically greater than or equal to the permitted key. In server/etcdserver/api/v3rpc/watch.go, the open-ended RangeEnd sentinel is rewritten before the RBAC permission check in server/auth/range_perm_cache.go function isRangeOpPermitted, causing the request to be treated as an exact-key watch. Range/Get and DeleteRange requests are not affected, and the issue affects only clusters with authentication enabled. This issue is fixed in versions 3.5.33, 3.6.14, and 3.7.1.",
  "id": "UBUNTU-CVE-2026-73499",
  "modified": "2026-08-13T00:00:00Z",
  "published": "2026-08-13T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-73499"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-73499"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/etcd-io/etcd/security/advisories/GHSA-xg4h-6gfc-h4m8"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/etcd-io/etcd/commit/6643f80602461a6095c9b294b6512fd9719bef41"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/etcd-io/etcd/commit/7cf71ec9e2ec54230a5454392fa4ffd4574b41ed"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/etcd-io/etcd/commit/afeaa624da19085b47fb5ccc7c22a8c421bc2eae"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/etcd-io/etcd/commit/e863b001bbf3367003a543aa3099db9892134cd7"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/etcd-io/etcd/releases/tag/v3.5.33"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/etcd-io/etcd/releases/tag/v3.6.14"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/etcd-io/etcd/releases/tag/v3.7.1"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-73499"
  ]
}

CVE-2026-73499 (GCVE-0-2026-73499)

Vulnerability from cvelistv5 – Published: 2026-08-12 21:20 – Updated: 2026-08-14 22:19

Title

etcd: Watch API authorization bypass via open-ended range requests

Summary

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-14 22:19 UTC

CWE

CWE-863 - Incorrect Authorization

Assigner

GitHub_M

References

8 references

URL	Tags
https://github.com/etcd-io/etcd/security/advisori…	x_refsource_CONFIRM
https://github.com/etcd-io/etcd/commit/6643f80602…	x_refsource_MISC
https://github.com/etcd-io/etcd/commit/7cf71ec9e2…	x_refsource_MISC
https://github.com/etcd-io/etcd/commit/afeaa624da…	x_refsource_MISC
https://github.com/etcd-io/etcd/commit/e863b001bb…	x_refsource_MISC
https://github.com/etcd-io/etcd/releases/tag/v3.5.33	x_refsource_MISC
https://github.com/etcd-io/etcd/releases/tag/v3.6.14	x_refsource_MISC
https://github.com/etcd-io/etcd/releases/tag/v3.7.1	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
etcd-io	etcd	Affected: < 3.5.33 Affected: >= 3.6.0, < 3.6.14 Affected: >= 3.7.0-alpha.0, < 3.7.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-73499",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-14T22:19:48.980697Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-14T22:19:59.624Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "etcd",
          "vendor": "etcd-io",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.5.33"
            },
            {
              "status": "affected",
              "version": "\u003e= 3.6.0, \u003c 3.6.14"
            },
            {
              "status": "affected",
              "version": "\u003e= 3.7.0-alpha.0, \u003c 3.7.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "etcd is a distributed key-value store for the data of a distributed system. Prior to versions 3.5.33, 3.6.14, and 3.7.1, a user granted READ permission on a single exact key can use the Watch gRPC API with clientv3.WithFromKey() to receive watch events for every key lexicographically greater than or equal to the permitted key. In server/etcdserver/api/v3rpc/watch.go, the open-ended RangeEnd sentinel is rewritten before the RBAC permission check in server/auth/range_perm_cache.go function isRangeOpPermitted, causing the request to be treated as an exact-key watch. Range/Get and DeleteRange requests are not affected, and the issue affects only clusters with authentication enabled. This issue is fixed in versions 3.5.33, 3.6.14, and 3.7.1."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-863",
              "description": "CWE-863: Incorrect Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-12T21:20:31.888Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/etcd-io/etcd/security/advisories/GHSA-xg4h-6gfc-h4m8",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/etcd-io/etcd/security/advisories/GHSA-xg4h-6gfc-h4m8"
        },
        {
          "name": "https://github.com/etcd-io/etcd/commit/6643f80602461a6095c9b294b6512fd9719bef41",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/etcd-io/etcd/commit/6643f80602461a6095c9b294b6512fd9719bef41"
        },
        {
          "name": "https://github.com/etcd-io/etcd/commit/7cf71ec9e2ec54230a5454392fa4ffd4574b41ed",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/etcd-io/etcd/commit/7cf71ec9e2ec54230a5454392fa4ffd4574b41ed"
        },
        {
          "name": "https://github.com/etcd-io/etcd/commit/afeaa624da19085b47fb5ccc7c22a8c421bc2eae",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/etcd-io/etcd/commit/afeaa624da19085b47fb5ccc7c22a8c421bc2eae"
        },
        {
          "name": "https://github.com/etcd-io/etcd/commit/e863b001bbf3367003a543aa3099db9892134cd7",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/etcd-io/etcd/commit/e863b001bbf3367003a543aa3099db9892134cd7"
        },
        {
          "name": "https://github.com/etcd-io/etcd/releases/tag/v3.5.33",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/etcd-io/etcd/releases/tag/v3.5.33"
        },
        {
          "name": "https://github.com/etcd-io/etcd/releases/tag/v3.6.14",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/etcd-io/etcd/releases/tag/v3.6.14"
        },
        {
          "name": "https://github.com/etcd-io/etcd/releases/tag/v3.7.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/etcd-io/etcd/releases/tag/v3.7.1"
        }
      ],
      "source": {
        "advisory": "GHSA-xg4h-6gfc-h4m8",
        "discovery": "UNKNOWN"
      },
      "title": "etcd: Watch API authorization bypass via open-ended range requests"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-73499",
    "datePublished": "2026-08-12T21:20:31.888Z",
    "dateReserved": "2026-08-12T19:00:33.736Z",
    "dateUpdated": "2026-08-14T22:19:59.624Z",
    "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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

ubuntu-cve-2026-73499

Vulnerability from osv_ubuntu

CVE-2026-73499 (GCVE-0-2026-73499)

Tags

Sightings

Nomenclature