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UBUNTU-CVE-2026-49017

Type: advisorySource: OSV1 source record

In OpenStack Swift before 2.36.2 and 2.37.2, s3api middleware enters an infinite loop when processing a truncated aws-chunked PUT request body. The StreamingInput class repeatedly appends an empty buffer and re-reads, causing the proxy-server worker handling the request to become permanently unresponsive with increasing CPU and memory consumption. An authenticated attacker can systematically exhaust all proxy-server workers, resulting in denial of service. The defect was introduced in Swift 2.36.0.

Announced Source revision 1
Original source ↗

UBUNTU-CVE-2026-49017

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:UBUNTU-CVE-2026-49017

swift

Source reference: /affected/0/package/name

Affected versions
2.35.0-0ubuntu1

Source reference: /affected/0/versions

2.35.0+git2025070714.1428eb3b5-0ubuntu1

Source reference: /affected/0/versions

2.36.0-0ubuntu1

Source reference: /affected/0/versions

2.36.0-0ubuntu1.1

Source reference: /affected/0/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

swift

Source reference: /affected/1/package/name

Affected versions
2.36.0-0ubuntu1

Source reference: /affected/1/versions

2.37.0-0ubuntu1

Source reference: /affected/1/versions

2.37.1-0ubuntu2

Source reference: /affected/1/versions

Fixed versions
2.37.1-0ubuntu2.1

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "swift",
      "purl": "pkg:deb/ubuntu/swift?arch=source&distro=questing",
      "ecosystem": "Ubuntu:25.10"
    },
    "versions": [
      "2.35.0-0ubuntu1",
      "2.35.0+git2025070714.1428eb3b5-0ubuntu1",
      "2.36.0-0ubuntu1",
      "2.36.0-0ubuntu1.1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49017.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "python3-swift",
          "binary_version": "2.36.0-0ubuntu1.1"
        },
        {
          "binary_name": "swift",
          "binary_version": "2.36.0-0ubuntu1.1"
        },
        {
          "binary_name": "swift-account",
          "binary_version": "2.36.0-0ubuntu1.1"
        },
        {
          "binary_name": "swift-container",
          "binary_version": "2.36.0-0ubuntu1.1"
        },
        {
          "binary_name": "swift-object",
          "binary_version": "2.36.0-0ubuntu1.1"
        },
        {
          "binary_name": "swift-object-expirer",
          "binary_version": "2.36.0-0ubuntu1.1"
        },
        {
          "binary_name": "swift-proxy",
          "binary_version": "2.36.0-0ubuntu1.1"
        }
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "2.37.1-0ubuntu2.1"
          }
        ]
      }
    ],
    "package": {
      "name": "swift",
      "purl": "pkg:deb/ubuntu/swift?arch=source&distro=resolute",
      "ecosystem": "Ubuntu:26.04:LTS"
    },
    "versions": [
      "2.36.0-0ubuntu1",
      "2.37.0-0ubuntu1",
      "2.37.1-0ubuntu2"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49017.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "python3-swift",
          "binary_version": "2.37.1-0ubuntu2.1"
        },
        {
          "binary_name": "swift",
          "binary_version": "2.37.1-0ubuntu2.1"
        },
        {
          "binary_name": "swift-account",
          "binary_version": "2.37.1-0ubuntu2.1"
        },
        {
          "binary_name": "swift-container",
          "binary_version": "2.37.1-0ubuntu2.1"
        },
        {
          "binary_name": "swift-object",
          "binary_version": "2.37.1-0ubuntu2.1"
        },
        {
          "binary_name": "swift-object-expirer",
          "binary_version": "2.37.1-0ubuntu2.1"
        },
        {
          "binary_name": "swift-proxy",
          "binary_version": "2.37.1-0ubuntu2.1"
        }
      ],
      "availability": "No subscription required"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#17545 · Revision 1
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Publisher date
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