High
etcd — security advisory
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.
- Products
- etcd
- Affected 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, 3.1.0-1, 3.2.17+dfsg-1, 3.2.17+dfsg-1ubuntu0.1, 3.2.17+dfsg-1ubuntu0.1+esm1, 3.2.17+dfsg-1ubuntu0.1+esm2, 3.2.17+dfsg-1ubuntu0.1~esm1, 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, 3.2.9+dfsg-2, 3.2.9+dfsg-3, 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, 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, 3.5.16-10, 3.5.16-10ubuntu0.26.04.1~esm1, 3.5.16-4, 3.5.30-2
- Fixed versions
- Not specified
- CVEs
- CVE-2026-73499
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:15 UTC · Revision 1
Source evidence
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.
osv:UBUNTU-CVE-2026-73499
etcd
Fixed versions: Not specified
etcd
Fixed versions: Not specified
etcd
Fixed versions: Not specified
etcd
Fixed versions: Not specified
etcd
Fixed versions: Not specified
etcd
Fixed versions: Not specified
etcd
Fixed versions: Not specified
Complete source record
{
"id": "b3249db97b8736f160449d1a765677922148f9e3c3fdcf84e6d008c306fe63e8",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-73499",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-73499",
"summary": "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.",
"evidence": "osv:UBUNTU-CVE-2026-73499",
"products": [
{
"name": {
"value": "etcd",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.2.0+dfsg-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.2.1+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.2.2+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.2.2+dfsg-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.2.3+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.2.5+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.2.5+dfsg-1ubuntu1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "etcd",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.1.0-1",
"evidence": "/affected/1/versions"
},
{
"value": "3.2.9+dfsg-2",
"evidence": "/affected/1/versions"
},
{
"value": "3.2.9+dfsg-3",
"evidence": "/affected/1/versions"
},
{
"value": "3.2.17+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "3.2.17+dfsg-1ubuntu0.1~esm1",
"evidence": "/affected/1/versions"
},
{
"value": "3.2.17+dfsg-1ubuntu0.1",
"evidence": "/affected/1/versions"
},
{
"value": "3.2.17+dfsg-1ubuntu0.1+esm1",
"evidence": "/affected/1/versions"
},
{
"value": "3.2.17+dfsg-1ubuntu0.1+esm2",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "etcd",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.2.26+dfsg-3",
"evidence": "/affected/2/versions"
},
{
"value": "3.2.26+dfsg-4",
"evidence": "/affected/2/versions"
},
{
"value": "3.2.26+dfsg-6",
"evidence": "/affected/2/versions"
},
{
"value": "3.2.26+dfsg-6ubuntu0.1",
"evidence": "/affected/2/versions"
},
{
"value": "3.2.26+dfsg-6ubuntu0.2",
"evidence": "/affected/2/versions"
},
{
"value": "3.2.26+dfsg-6ubuntu0.2+esm1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "etcd",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.3.25+dfsg-6",
"evidence": "/affected/3/versions"
},
{
"value": "3.3.25+dfsg-7",
"evidence": "/affected/3/versions"
},
{
"value": "3.3.25+dfsg-7ubuntu0.22.04.1",
"evidence": "/affected/3/versions"
},
{
"value": "3.3.25+dfsg-7ubuntu0.22.04.1+esm1",
"evidence": "/affected/3/versions"
},
{
"value": "3.3.25+dfsg-7ubuntu0.22.04.2",
"evidence": "/affected/3/versions"
},
{
"value": "3.3.25+dfsg-7ubuntu0.22.04.2+esm1",
"evidence": "/affected/3/versions"
},
{
"value": "3.3.25+dfsg-7ubuntu0.22.04.2+esm2",
"evidence": "/affected/3/versions"
},
{
"value": "3.3.25+dfsg-7ubuntu0.22.04.2+esm3",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "etcd",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.4.23-4ubuntu2",
"evidence": "/affected/4/versions"
},
{
"value": "3.4.30-1",
"evidence": "/affected/4/versions"
},
{
"value": "3.4.30-1build1",
"evidence": "/affected/4/versions"
},
{
"value": "3.4.30-1ubuntu0.24.04.1",
"evidence": "/affected/4/versions"
},
{
"value": "3.4.30-1ubuntu0.24.04.2",
"evidence": "/affected/4/versions"
},
{
"value": "3.4.30-1ubuntu0.24.04.2+esm1",
"evidence": "/affected/4/versions"
},
{
"value": "3.4.30-1ubuntu0.24.04.3",
"evidence": "/affected/4/versions"
},
{
"value": "3.4.30-1ubuntu0.24.04.3+esm1",
"evidence": "/affected/4/versions"
},
{
"value": "3.4.30-1ubuntu0.24.04.3+esm2",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "etcd",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.5.16-10",
"evidence": "/affected/5/versions"
},
{
"value": "3.5.30-2",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "etcd",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.5.16-4",
"evidence": "/affected/6/versions"
},
{
"value": "3.5.16-10",
"evidence": "/affected/6/versions"
},
{
"value": "3.5.16-10ubuntu0.26.04.1~esm1",
"evidence": "/affected/6/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2026-73499",
"aliases": [
"UBUNTU-CVE-2026-73499"
],
"metrics": [
{
"type": "CVSS_V4",
"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": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "etcd",
"purl": "pkg:deb/ubuntu/etcd?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"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"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73499.json"
},
"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"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "etcd",
"purl": "pkg:deb/ubuntu/etcd?arch=source&distro=esm-apps%2Fbionic",
"ecosystem": "Ubuntu:Pro:18.04:LTS"
},
"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"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73499.json"
},
"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"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "etcd",
"purl": "pkg:deb/ubuntu/etcd?arch=source&distro=esm-apps%2Ffocal",
"ecosystem": "Ubuntu:Pro:20.04:LTS"
},
"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"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73499.json"
},
"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"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "etcd",
"purl": "pkg:deb/ubuntu/etcd?arch=source&distro=esm-apps%2Fjammy",
"ecosystem": "Ubuntu:Pro:22.04:LTS"
},
"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"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73499.json"
},
"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"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "etcd",
"purl": "pkg:deb/ubuntu/etcd?arch=source&distro=esm-apps%2Fnoble",
"ecosystem": "Ubuntu:Pro:24.04:LTS"
},
"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"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73499.json"
},
"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"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "etcd",
"purl": "pkg:deb/ubuntu/etcd?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"3.5.16-10",
"3.5.30-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73499.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "etcd-client",
"binary_version": "3.5.30-2"
},
{
"binary_name": "etcd-server",
"binary_version": "3.5.30-2"
},
{
"binary_name": "golang-etcd-server-dev",
"binary_version": "3.5.30-2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "etcd",
"purl": "pkg:deb/ubuntu/etcd?arch=source&distro=esm-apps%2Fresolute",
"ecosystem": "Ubuntu:Pro:26.04:LTS"
},
"versions": [
"3.5.16-4",
"3.5.16-10",
"3.5.16-10ubuntu0.26.04.1~esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73499.json"
},
"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"
}
]
}
}
],
"modified": "2026-10-17T13:01:03.040362557Z",
"provider": "osv",
"upstream": [
"CVE-2026-73499"
],
"references": [
"https://ubuntu.com/security/CVE-2026-73499",
"https://www.cve.org/CVERecord?id=CVE-2026-73499",
"https://github.com/etcd-io/etcd/security/advisories/GHSA-xg4h-6gfc-h4m8",
"https://github.com/etcd-io/etcd/commit/6643f80602461a6095c9b294b6512fd9719bef41",
"https://github.com/etcd-io/etcd/commit/7cf71ec9e2ec54230a5454392fa4ffd4574b41ed",
"https://github.com/etcd-io/etcd/commit/afeaa624da19085b47fb5ccc7c22a8c421bc2eae",
"https://github.com/etcd-io/etcd/commit/e863b001bbf3367003a543aa3099db9892134cd7",
"https://github.com/etcd-io/etcd/releases/tag/v3.5.33",
"https://github.com/etcd-io/etcd/releases/tag/v3.6.14",
"https://github.com/etcd-io/etcd/releases/tag/v3.7.1"
]
},
"related_cves": [
{
"value": "CVE-2026-73499",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 360902,
"published_at": "2026-08-12T22:17:00+00:00"
}