ubuntu-cve-2026-44283
Vulnerability from osv_ubuntu
Published
2026-05-14 18:16
Modified
2026-07-02 16:14
Summary
Details
etcd is a distributed key-value store for the data of a distributed system. Prior to 3.4.44, 3.5.30, and 3.6.11, a vulnerability in etcd allows read access via PrevKv, or lease attachment in Put requests within transaction operations, to bypass RBAC authorization checks. An authenticated user without sufficient read or lease-related permissions may be able to access unauthorized data or attach leases by invoking transaction operations with these features enabled. This vulnerability is fixed in 3.4.44, 3.5.30, and 3.6.11.
Severity
0.0 (None)
4.3 (Medium)
N/A (UNKNOWN)
References
{
"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": "3.5.16-4"
},
{
"binary_name": "etcd-server",
"binary_version": "3.5.16-4"
},
{
"binary_name": "golang-etcd-server-dev",
"binary_version": "3.5.16-4"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "etcd",
"purl": "pkg:deb/ubuntu/etcd@3.5.16-4?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.5.16-4"
]
},
{
"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 3.4.44, 3.5.30, and 3.6.11, a vulnerability in etcd allows read access via PrevKv, or lease attachment in Put requests within transaction operations, to bypass RBAC authorization checks. An authenticated user without sufficient read or lease-related permissions may be able to access unauthorized data or attach leases by invoking transaction operations with these features enabled. This vulnerability is fixed in 3.4.44, 3.5.30, and 3.6.11.",
"id": "UBUNTU-CVE-2026-44283",
"modified": "2026-07-02T16:14:45Z",
"published": "2026-05-14T18:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-44283"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-44283"
},
{
"type": "REPORT",
"url": "https://github.com/etcd-io/etcd/security/advisories/GHSA-x35m-3gp4-4fh5"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-44283"
]
}
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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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