Security advisory

{
  "id": "0002c8608031cfaa53b3d192dbd42452ace81e61a42a99252af678466a749d75",
  "url": "https://osv.dev/vulnerability/CVE-2026-71190",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-71190",
    "summary": "In OpenStack Swift through 2.38.0, the proxy server Accept header parser contains a regular expression vulnerable to catastrophic backtracking (ReDoS). The \"qdtext\" pattern (?:[^\"]|\\\\.)* allows an unauthenticated remote attacker to send a crafted Accept header that causes exponential CPU consumption in the proxy worker. A payload of 32 backslash-character pairs exceeds 30 seconds of CPU time. No authentication is required. Repeated requests can exhaust all proxy worker threads, resulting in a complete denial of service.",
    "evidence": "osv:CVE-2026-71190",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-71190",
      "aliases": [
        "CVE-2026-71190"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://opendev.org/openstack/swift",
              "type": "GIT",
              "events": [
                {
                  "introduced": "4bd9e4584d31eb37c7e30e555daeb6b90703ee3a"
                },
                {
                  "fixed": "fc875f93e82edf98805d0eead3e3c961673c3ef8"
                },
                {
                  "introduced": "82cb5a5d78b91c6af258cd8f06d30f69be90fa18"
                },
                {
                  "fixed": "deaa3e4691bb19224f5ef57e7fbcd08b7eff5277"
                },
                {
                  "introduced": "555026d200337b39c97eb9dafd26901ff40c7a1d"
                },
                {
                  "fixed": "5104042f12efcaf90c28b656a378da8959004826"
                },
                {
                  "introduced": "9f5881d5143fd06a328bde2713cd9c61df579289"
                },
                {
                  "last_affected": "9f5881d5143fd06a328bde2713cd9c61df579289"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "1.9.1"
                      },
                      {
                        "fixed": "2.35.4"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "2.36.0"
                      },
                      {
                        "fixed": "2.36.3"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "2.37.0"
                      },
                      {
                        "fixed": "2.37.3"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "2.38.0"
                      },
                      {
                        "last_affected": "2.38.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.38.0",
            "2.37.2",
            "2.36.2",
            "2.36.1",
            "2.37.1",
            "2.37.0",
            "2.36.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71190.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:22.603814618Z",
      "provider": "osv",
      "references": [
        "https://opendev.org/openstack/swift",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71190.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-71190",
        "https://openwall.com/lists/oss-security/2026/07/28/27",
        "https://security.openstack.org/ossa/OSSA-2026-031.html",
        "https://launchpad.net/bugs/2158771"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-1333"
        ],
        "cna_assigner": "mitre",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71190.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-71190",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 488873,
  "published_at": "2026-08-05T04:54:03.02+00:00"
}