High
ansible, ansible-core — security advisory
A flaw was found in the memcached cache plugin of the community.general Ansible collection. Although its documentation states that records are stored in JSON format, the plugin performs no explicit serialization and relies on python-memcached, which pickles values on write and unpickles them on read. Because memcached is unauthenticated and cache keys are predictable, an attacker able to reach a network-exposed or shared memcached instance can write a crafted pickle payload that is deserialized and executed on the Ansible controller when the poisoned fact cache is next read, leading to remote code execution.
- Products
- ansible, ansible-core
- Affected versions
- 1.1+dfsg-1, 1.3.4+dfsg-1, 1.4.0+dfsg-1, 1.4.1+dfsg-1, 1.4.3+dfsg-1, 1.4.4+dfsg-1, 1.5.4+dfsg-1, 1.5.4+dfsg-1ubuntu0.1~esm1, 1.5.4+dfsg-1ubuntu0.1~esm2, 1.5.4+dfsg-1ubuntu0.1~esm3, 1.9.2+dfsg-2, 1.9.4-1, 12.0.0+dfsg-1, 12.0.0~b1+dfsg-1, 12.2.0+dfsg-1, 13.1.0+dfsg-1, 13.1.0+dfsg-1ubuntu1, 13.4.0+dfsg-1, 2.0.0.2-2, 2.0.0.2-2ubuntu1, 2.0.0.2-2ubuntu1.1, 2.0.0.2-2ubuntu1.2, 2.0.0.2-2ubuntu1.3, 2.0.0.2-2ubuntu1.3+esm1, 2.0.0.2-2ubuntu1.3+esm2, 2.0.0.2-2ubuntu1.3+esm3, 2.0.0.2-2ubuntu1.3+esm4, 2.0.0.2-2ubuntu1.3+esm5, 2.0.0.2-2ubuntu1.3+esm6, 2.10.7+merged+base+2.10.8+dfsg-1, 2.10.7+merged+base+2.10.8+dfsg-1ubuntu0.1~esm1, 2.10.7+merged+base+2.10.8+dfsg-1ubuntu0.1~esm4, 2.12.0-1, 2.12.0-1ubuntu0.1, 2.14.11-1, 2.14.11-2, 2.14.13-1, 2.14.9-2, 2.16.3-0ubuntu1, 2.16.3-0ubuntu2, 2.19.0-1ubuntu1, 2.19.4-1, 2.20.1-1, 2.21.1~rc1-1, 2.21.1~rc1-2, 2.21.1~rc1-2ubuntu1, 2.22.0~beta2-1, 2.3.1.0+dfsg-2, 2.5.0+dfsg-1, 2.5.1+dfsg-1, 2.5.1+dfsg-1ubuntu0.1, 2.5.1+dfsg-1ubuntu0.1+esm1, 2.5.1+dfsg-1ubuntu0.1+esm2, 2.5.1+dfsg-1ubuntu0.1+esm3, 2.5.1+dfsg-1ubuntu0.1+esm4, 2.5.1+dfsg-1ubuntu0.1+esm5, 2.8.3+dfsg-1, 2.8.6+dfsg-1, 2.9.2+dfsg-1, 2.9.4+dfsg-1, 2.9.6+dfsg-1, 2.9.6+dfsg-1ubuntu0.1~esm1, 2.9.6+dfsg-1ubuntu0.1~esm2, 2.9.6+dfsg-1ubuntu0.1~esm3, 7.7.0+dfsg-1, 7.7.0+dfsg-3, 9.2.0+dfsg-0ubuntu4, 9.2.0+dfsg-0ubuntu5
- Fixed versions
- Not specified
- CVEs
- CVE-2026-87874
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:25 UTC · Revision 1
Source evidence
A flaw was found in the memcached cache plugin of the community.general Ansible collection. Although its documentation states that records are stored in JSON format, the plugin performs no explicit serialization and relies on python-memcached, which pickles values on write and unpickles them on read. Because memcached is unauthenticated and cache keys are predictable, an attacker able to reach a network-exposed or shared memcached instance can write a crafted pickle payload that is deserialized and executed on the Ansible controller when the poisoned fact cache is next read, leading to remote code execution.
osv:UBUNTU-CVE-2026-87874
ansible
Fixed versions: Not specified
ansible
Fixed versions: Not specified
ansible
Fixed versions: Not specified
ansible
Fixed versions: Not specified
ansible-core
Fixed versions: Not specified
ansible
Fixed versions: Not specified
ansible
Fixed versions: Not specified
ansible-core
Fixed versions: Not specified
ansible
Fixed versions: Not specified
ansible-core
Fixed versions: Not specified
ansible
Fixed versions: Not specified
ansible-core
Fixed versions: Not specified
Complete source record
{
"id": "75480adb2d13c6062560992462c4fa8e1523a27e1604d59d707289db5f44cfe5",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-87874",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-87874",
"summary": "A flaw was found in the memcached cache plugin of the community.general Ansible collection. Although its documentation states that records are stored in JSON format, the plugin performs no explicit serialization and relies on python-memcached, which pickles values on write and unpickles them on read. Because memcached is unauthenticated and cache keys are predictable, an attacker able to reach a network-exposed or shared memcached instance can write a crafted pickle payload that is deserialized and executed on the Ansible controller when the poisoned fact cache is next read, leading to remote code execution.",
"evidence": "osv:UBUNTU-CVE-2026-87874",
"products": [
{
"name": {
"value": "ansible",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.1+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.3.4+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.4.0+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.4.1+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.4.3+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.4.4+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.5.4+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.5.4+dfsg-1ubuntu0.1~esm1",
"evidence": "/affected/0/versions"
},
{
"value": "1.5.4+dfsg-1ubuntu0.1~esm2",
"evidence": "/affected/0/versions"
},
{
"value": "1.5.4+dfsg-1ubuntu0.1~esm3",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "ansible",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.9.2+dfsg-2",
"evidence": "/affected/1/versions"
},
{
"value": "1.9.4-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.0.0.2-2",
"evidence": "/affected/1/versions"
},
{
"value": "2.0.0.2-2ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "2.0.0.2-2ubuntu1.1",
"evidence": "/affected/1/versions"
},
{
"value": "2.0.0.2-2ubuntu1.2",
"evidence": "/affected/1/versions"
},
{
"value": "2.0.0.2-2ubuntu1.3",
"evidence": "/affected/1/versions"
},
{
"value": "2.0.0.2-2ubuntu1.3+esm1",
"evidence": "/affected/1/versions"
},
{
"value": "2.0.0.2-2ubuntu1.3+esm2",
"evidence": "/affected/1/versions"
},
{
"value": "2.0.0.2-2ubuntu1.3+esm3",
"evidence": "/affected/1/versions"
},
{
"value": "2.0.0.2-2ubuntu1.3+esm4",
"evidence": "/affected/1/versions"
},
{
"value": "2.0.0.2-2ubuntu1.3+esm5",
"evidence": "/affected/1/versions"
},
{
"value": "2.0.0.2-2ubuntu1.3+esm6",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "ansible",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.3.1.0+dfsg-2",
"evidence": "/affected/2/versions"
},
{
"value": "2.5.0+dfsg-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.5.1+dfsg-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.5.1+dfsg-1ubuntu0.1",
"evidence": "/affected/2/versions"
},
{
"value": "2.5.1+dfsg-1ubuntu0.1+esm1",
"evidence": "/affected/2/versions"
},
{
"value": "2.5.1+dfsg-1ubuntu0.1+esm2",
"evidence": "/affected/2/versions"
},
{
"value": "2.5.1+dfsg-1ubuntu0.1+esm3",
"evidence": "/affected/2/versions"
},
{
"value": "2.5.1+dfsg-1ubuntu0.1+esm4",
"evidence": "/affected/2/versions"
},
{
"value": "2.5.1+dfsg-1ubuntu0.1+esm5",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "ansible",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.8.3+dfsg-1",
"evidence": "/affected/3/versions"
},
{
"value": "2.8.6+dfsg-1",
"evidence": "/affected/3/versions"
},
{
"value": "2.9.2+dfsg-1",
"evidence": "/affected/3/versions"
},
{
"value": "2.9.4+dfsg-1",
"evidence": "/affected/3/versions"
},
{
"value": "2.9.6+dfsg-1",
"evidence": "/affected/3/versions"
},
{
"value": "2.9.6+dfsg-1ubuntu0.1~esm1",
"evidence": "/affected/3/versions"
},
{
"value": "2.9.6+dfsg-1ubuntu0.1~esm2",
"evidence": "/affected/3/versions"
},
{
"value": "2.9.6+dfsg-1ubuntu0.1~esm3",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "ansible-core",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.12.0-1",
"evidence": "/affected/4/versions"
},
{
"value": "2.12.0-1ubuntu0.1",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "ansible",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.10.7+merged+base+2.10.8+dfsg-1",
"evidence": "/affected/5/versions"
},
{
"value": "2.10.7+merged+base+2.10.8+dfsg-1ubuntu0.1~esm1",
"evidence": "/affected/5/versions"
},
{
"value": "2.10.7+merged+base+2.10.8+dfsg-1ubuntu0.1~esm4",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "ansible",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "7.7.0+dfsg-1",
"evidence": "/affected/6/versions"
},
{
"value": "7.7.0+dfsg-3",
"evidence": "/affected/6/versions"
},
{
"value": "9.2.0+dfsg-0ubuntu4",
"evidence": "/affected/6/versions"
},
{
"value": "9.2.0+dfsg-0ubuntu5",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
"value": "ansible-core",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.14.9-2",
"evidence": "/affected/7/versions"
},
{
"value": "2.14.11-1",
"evidence": "/affected/7/versions"
},
{
"value": "2.14.11-2",
"evidence": "/affected/7/versions"
},
{
"value": "2.14.13-1",
"evidence": "/affected/7/versions"
},
{
"value": "2.16.3-0ubuntu1",
"evidence": "/affected/7/versions"
},
{
"value": "2.16.3-0ubuntu2",
"evidence": "/affected/7/versions"
}
]
},
{
"name": {
"value": "ansible",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "13.1.0+dfsg-1ubuntu1",
"evidence": "/affected/8/versions"
},
{
"value": "13.4.0+dfsg-1",
"evidence": "/affected/8/versions"
}
]
},
{
"name": {
"value": "ansible-core",
"evidence": "/affected/9/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.20.1-1",
"evidence": "/affected/9/versions"
},
{
"value": "2.21.1~rc1-1",
"evidence": "/affected/9/versions"
},
{
"value": "2.21.1~rc1-2",
"evidence": "/affected/9/versions"
},
{
"value": "2.21.1~rc1-2ubuntu1",
"evidence": "/affected/9/versions"
},
{
"value": "2.22.0~beta2-1",
"evidence": "/affected/9/versions"
}
]
},
{
"name": {
"value": "ansible",
"evidence": "/affected/10/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "12.0.0~b1+dfsg-1",
"evidence": "/affected/10/versions"
},
{
"value": "12.0.0+dfsg-1",
"evidence": "/affected/10/versions"
},
{
"value": "12.2.0+dfsg-1",
"evidence": "/affected/10/versions"
},
{
"value": "13.1.0+dfsg-1",
"evidence": "/affected/10/versions"
},
{
"value": "13.1.0+dfsg-1ubuntu1",
"evidence": "/affected/10/versions"
}
]
},
{
"name": {
"value": "ansible-core",
"evidence": "/affected/11/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.19.0-1ubuntu1",
"evidence": "/affected/11/versions"
},
{
"value": "2.19.4-1",
"evidence": "/affected/11/versions"
},
{
"value": "2.20.1-1",
"evidence": "/affected/11/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2026-87874",
"aliases": [
"UBUNTU-CVE-2026-87874"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "ansible",
"purl": "pkg:deb/ubuntu/ansible?arch=source&distro=esm-infra-legacy%2Ftrusty",
"ecosystem": "Ubuntu:Pro:14.04:LTS"
},
"versions": [
"1.1+dfsg-1",
"1.3.4+dfsg-1",
"1.4.0+dfsg-1",
"1.4.1+dfsg-1",
"1.4.3+dfsg-1",
"1.4.4+dfsg-1",
"1.5.4+dfsg-1",
"1.5.4+dfsg-1ubuntu0.1~esm1",
"1.5.4+dfsg-1ubuntu0.1~esm2",
"1.5.4+dfsg-1ubuntu0.1~esm3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-87874.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "ansible",
"binary_version": "1.5.4+dfsg-1ubuntu0.1~esm3"
},
{
"binary_name": "ansible-fireball",
"binary_version": "1.5.4+dfsg-1ubuntu0.1~esm3"
},
{
"binary_name": "ansible-node-fireball",
"binary_version": "1.5.4+dfsg-1ubuntu0.1~esm3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "ansible",
"purl": "pkg:deb/ubuntu/ansible?arch=source&distro=esm-apps%2Fxenial",
"ecosystem": "Ubuntu:Pro:16.04:LTS"
},
"versions": [
"1.9.2+dfsg-2",
"1.9.4-1",
"2.0.0.2-2",
"2.0.0.2-2ubuntu1",
"2.0.0.2-2ubuntu1.1",
"2.0.0.2-2ubuntu1.2",
"2.0.0.2-2ubuntu1.3",
"2.0.0.2-2ubuntu1.3+esm1",
"2.0.0.2-2ubuntu1.3+esm2",
"2.0.0.2-2ubuntu1.3+esm3",
"2.0.0.2-2ubuntu1.3+esm4",
"2.0.0.2-2ubuntu1.3+esm5",
"2.0.0.2-2ubuntu1.3+esm6"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-87874.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "ansible",
"binary_version": "2.0.0.2-2ubuntu1.3+esm6"
},
{
"binary_name": "ansible-fireball",
"binary_version": "2.0.0.2-2ubuntu1.3+esm6"
},
{
"binary_name": "ansible-node-fireball",
"binary_version": "2.0.0.2-2ubuntu1.3+esm6"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "ansible",
"purl": "pkg:deb/ubuntu/ansible?arch=source&distro=esm-apps%2Fbionic",
"ecosystem": "Ubuntu:Pro:18.04:LTS"
},
"versions": [
"2.3.1.0+dfsg-2",
"2.5.0+dfsg-1",
"2.5.1+dfsg-1",
"2.5.1+dfsg-1ubuntu0.1",
"2.5.1+dfsg-1ubuntu0.1+esm1",
"2.5.1+dfsg-1ubuntu0.1+esm2",
"2.5.1+dfsg-1ubuntu0.1+esm3",
"2.5.1+dfsg-1ubuntu0.1+esm4",
"2.5.1+dfsg-1ubuntu0.1+esm5"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-87874.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "ansible",
"binary_version": "2.5.1+dfsg-1ubuntu0.1+esm5"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "ansible",
"purl": "pkg:deb/ubuntu/ansible?arch=source&distro=esm-apps%2Ffocal",
"ecosystem": "Ubuntu:Pro:20.04:LTS"
},
"versions": [
"2.8.3+dfsg-1",
"2.8.6+dfsg-1",
"2.9.2+dfsg-1",
"2.9.4+dfsg-1",
"2.9.6+dfsg-1",
"2.9.6+dfsg-1ubuntu0.1~esm1",
"2.9.6+dfsg-1ubuntu0.1~esm2",
"2.9.6+dfsg-1ubuntu0.1~esm3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-87874.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "ansible",
"binary_version": "2.9.6+dfsg-1ubuntu0.1~esm3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "ansible-core",
"purl": "pkg:deb/ubuntu/ansible-core?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"2.12.0-1",
"2.12.0-1ubuntu0.1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-87874.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "ansible-core",
"binary_version": "2.12.0-1ubuntu0.1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "ansible",
"purl": "pkg:deb/ubuntu/ansible?arch=source&distro=esm-apps%2Fjammy",
"ecosystem": "Ubuntu:Pro:22.04:LTS"
},
"versions": [
"2.10.7+merged+base+2.10.8+dfsg-1",
"2.10.7+merged+base+2.10.8+dfsg-1ubuntu0.1~esm1",
"2.10.7+merged+base+2.10.8+dfsg-1ubuntu0.1~esm4"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-87874.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "ansible",
"binary_version": "2.10.7+merged+base+2.10.8+dfsg-1ubuntu0.1~esm4"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "ansible",
"purl": "pkg:deb/ubuntu/ansible?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"7.7.0+dfsg-1",
"7.7.0+dfsg-3",
"9.2.0+dfsg-0ubuntu4",
"9.2.0+dfsg-0ubuntu5"
],
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],
"modified": "2026-10-17T13:01:14.864298423Z",
"provider": "osv",
"upstream": [
"CVE-2026-87874"
],
"references": [
"https://ubuntu.com/security/CVE-2026-87874",
"https://www.cve.org/CVERecord?id=CVE-2026-87874",
"https://bugzilla.redhat.com/show_bug.cgi?id=2530995"
]
},
"related_cves": [
{
"value": "CVE-2026-87874",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 361355,
"published_at": "2026-09-09T17:17:00+00:00"
}