{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "2.38.0"
              },
              {
                "last_affected": "2.38.0"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "9f5881d5143fd06a328bde2713cd9c61df579289"
            },
            {
              "last_affected": "9f5881d5143fd06a328bde2713cd9c61df579289"
            }
          ],
          "repo": "https://opendev.org/openstack/swift",
          "type": "GIT"
        }
      ],
      "versions": [
        "2.38.0"
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "mitre",
    "cwe_ids": [
      "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71191.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "2.18.0"
          },
          {
            "fixed": "2.35.4"
          },
          {
            "introduced": "2.36.0"
          },
          {
            "fixed": "2.36.3"
          },
          {
            "introduced": "2.37.0"
          },
          {
            "fixed": "2.37.3"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "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.",
  "id": "CVE-2026-71191",
  "modified": "2026-08-08T03:30:09.124508186Z",
  "published": "2026-08-05T05:01:20.971Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://opendev.org/openstack/swift"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71191.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-71191"
    },
    {
      "type": "ADVISORY",
      "url": "https://openwall.com/lists/oss-security/2026/07/28/26"
    },
    {
      "type": "ADVISORY",
      "url": "https://security.openstack.org/ossa/OSSA-2026-030.html"
    },
    {
      "type": "REPORT",
      "url": "https://launchpad.net/bugs/2158733"
    }
  ],
  "schema_version": "1.8.0",
  "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"
    }
  ]
}