ubuntu-cve-2026-71191
Vulnerability from osv_ubuntu
Published
2026-08-05 06:16
Modified
2026-08-05 06:16
Summary
Details
In OpenStack Swift through 2.38.0, S3API middleware does not enforce that semantic x-amz-* headers are covered by the SigV4 signature on presigned URL requests. An attacker who obtains a presigned PUT URL can inject an unsigned X-Amz-Copy-Source header, causing Swift to perform a server-side copy from an arbitrary source object using the signer's authorization context. The attacker can read any object the signer has access to, provided the target project_id, container name, and object name are known. This affects all deployments using the default s3_acl=false configuration.
Severity
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python-swift",
"binary_version": "2.7.1-0ubuntu2"
},
{
"binary_name": "swift",
"binary_version": "2.7.1-0ubuntu2"
},
{
"binary_name": "swift-account",
"binary_version": "2.7.1-0ubuntu2"
},
{
"binary_name": "swift-container",
"binary_version": "2.7.1-0ubuntu2"
},
{
"binary_name": "swift-object",
"binary_version": "2.7.1-0ubuntu2"
},
{
"binary_name": "swift-object-expirer",
"binary_version": "2.7.1-0ubuntu2"
},
{
"binary_name": "swift-proxy",
"binary_version": "2.7.1-0ubuntu2"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "swift",
"purl": "pkg:deb/ubuntu/swift@2.7.1-0ubuntu2?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.5.0-0ubuntu1",
"2.7.0-0ubuntu2",
"2.7.0-0ubuntu2.1",
"2.7.1-0ubuntu1",
"2.7.1-0ubuntu2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python-swift",
"binary_version": "2.17.1-0ubuntu1"
},
{
"binary_name": "swift",
"binary_version": "2.17.1-0ubuntu1"
},
{
"binary_name": "swift-account",
"binary_version": "2.17.1-0ubuntu1"
},
{
"binary_name": "swift-container",
"binary_version": "2.17.1-0ubuntu1"
},
{
"binary_name": "swift-object",
"binary_version": "2.17.1-0ubuntu1"
},
{
"binary_name": "swift-object-expirer",
"binary_version": "2.17.1-0ubuntu1"
},
{
"binary_name": "swift-proxy",
"binary_version": "2.17.1-0ubuntu1"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "swift",
"purl": "pkg:deb/ubuntu/swift@2.17.1-0ubuntu1?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.15.1-0ubuntu3",
"2.16.0-0ubuntu1",
"2.16.0-0ubuntu2",
"2.17.0-0ubuntu1",
"2.17.1-0ubuntu1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-swift",
"binary_version": "2.25.2-0ubuntu1.1"
},
{
"binary_name": "swift",
"binary_version": "2.25.2-0ubuntu1.1"
},
{
"binary_name": "swift-account",
"binary_version": "2.25.2-0ubuntu1.1"
},
{
"binary_name": "swift-container",
"binary_version": "2.25.2-0ubuntu1.1"
},
{
"binary_name": "swift-object",
"binary_version": "2.25.2-0ubuntu1.1"
},
{
"binary_name": "swift-object-expirer",
"binary_version": "2.25.2-0ubuntu1.1"
},
{
"binary_name": "swift-proxy",
"binary_version": "2.25.2-0ubuntu1.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "swift",
"purl": "pkg:deb/ubuntu/swift@2.25.2-0ubuntu1.1?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.23.0-0ubuntu1",
"2.23.1-0ubuntu1",
"2.24.0~git2019121715.e890b0f0f-0ubuntu1",
"2.24.0-0ubuntu1",
"2.24.1~git2020032711.712bf3c9f-0ubuntu2",
"2.24.1~git2020041316.a495f1e32-0ubuntu1",
"2.25.0-0ubuntu0.20.04.1",
"2.25.1-0ubuntu1",
"2.25.2-0ubuntu1",
"2.25.2-0ubuntu1.1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-swift",
"binary_version": "2.29.2-0ubuntu1.1"
},
{
"binary_name": "swift",
"binary_version": "2.29.2-0ubuntu1.1"
},
{
"binary_name": "swift-account",
"binary_version": "2.29.2-0ubuntu1.1"
},
{
"binary_name": "swift-container",
"binary_version": "2.29.2-0ubuntu1.1"
},
{
"binary_name": "swift-object",
"binary_version": "2.29.2-0ubuntu1.1"
},
{
"binary_name": "swift-object-expirer",
"binary_version": "2.29.2-0ubuntu1.1"
},
{
"binary_name": "swift-proxy",
"binary_version": "2.29.2-0ubuntu1.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "swift",
"purl": "pkg:deb/ubuntu/swift@2.29.2-0ubuntu1.1?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.28.0+git2021090911.5d52afbe4-0ubuntu1",
"2.28.0+git2021120815.1859f2e16-0ubuntu1",
"2.28.0+git2021121320.876377435-0ubuntu1",
"2.28.0+git2022011309.32da73f5c-0ubuntu1",
"2.29.0+git2022030314.3ff3076ce-0ubuntu1",
"2.29.0+git2022030314.3ff3076ce-0ubuntu2",
"2.29.1-0ubuntu1",
"2.29.2-0ubuntu1",
"2.29.2-0ubuntu1.1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-swift",
"binary_version": "2.33.0-0ubuntu1.1"
},
{
"binary_name": "swift",
"binary_version": "2.33.0-0ubuntu1.1"
},
{
"binary_name": "swift-account",
"binary_version": "2.33.0-0ubuntu1.1"
},
{
"binary_name": "swift-container",
"binary_version": "2.33.0-0ubuntu1.1"
},
{
"binary_name": "swift-object",
"binary_version": "2.33.0-0ubuntu1.1"
},
{
"binary_name": "swift-object-expirer",
"binary_version": "2.33.0-0ubuntu1.1"
},
{
"binary_name": "swift-proxy",
"binary_version": "2.33.0-0ubuntu1.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "swift",
"purl": "pkg:deb/ubuntu/swift@2.33.0-0ubuntu1.1?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.32.0+git2023090714.8ce961ed-0ubuntu1",
"2.32.0+git2024021508.3aba22fd-0ubuntu1",
"2.32.0+git2024030809.4135133a-0ubuntu1",
"2.33.0-0ubuntu1",
"2.33.0-0ubuntu1.1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-swift",
"binary_version": "2.37.1-0ubuntu2"
},
{
"binary_name": "swift",
"binary_version": "2.37.1-0ubuntu2"
},
{
"binary_name": "swift-account",
"binary_version": "2.37.1-0ubuntu2"
},
{
"binary_name": "swift-container",
"binary_version": "2.37.1-0ubuntu2"
},
{
"binary_name": "swift-object",
"binary_version": "2.37.1-0ubuntu2"
},
{
"binary_name": "swift-object-expirer",
"binary_version": "2.37.1-0ubuntu2"
},
{
"binary_name": "swift-proxy",
"binary_version": "2.37.1-0ubuntu2"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "swift",
"purl": "pkg:deb/ubuntu/swift@2.37.1-0ubuntu2?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.36.0-0ubuntu1",
"2.37.0-0ubuntu1",
"2.37.1-0ubuntu2"
]
}
],
"aliases": [],
"details": "In OpenStack Swift through 2.38.0, S3API middleware does not enforce that semantic x-amz-* headers are covered by the SigV4 signature on presigned URL requests. An attacker who obtains a presigned PUT URL can inject an unsigned X-Amz-Copy-Source header, causing Swift to perform a server-side copy from an arbitrary source object using the signer\u0027s authorization context. The attacker can read any object the signer has access to, provided the target project_id, container name, and object name are known. This affects all deployments using the default s3_acl=false configuration.",
"id": "UBUNTU-CVE-2026-71191",
"modified": "2026-08-05T06:16:00Z",
"published": "2026-08-05T06:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-71191"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-71191"
},
{
"type": "REPORT",
"url": "https://security.openstack.org/ossa/OSSA-2026-030.html"
},
{
"type": "REPORT",
"url": "https://bugs.launchpad.net/swift/+bug/2158733"
},
{
"type": "REPORT",
"url": "https://launchpad.net/bugs/2158733"
},
{
"type": "REPORT",
"url": "https://openwall.com/lists/oss-security/2026/07/28/26"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:P/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-2026-71191"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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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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.
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