Vulnerability-Lookup

ubuntu-cve-2026-71190

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, 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.

Severity

8.7 (High)


                    
                      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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-71190	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-71190	REPORT
	https://security.openstack.org/ossa/OSSA-2026-031.html	REPORT
	https://bugs.launchpad.net/swift/+bug/2158771	REPORT
	https://launchpad.net/bugs/2158771	REPORT
	https://openwall.com/lists/oss-security/2026/07/28/27	REPORT

JSON

To clipboard

{
  "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, 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.",
  "id": "UBUNTU-CVE-2026-71190",
  "modified": "2026-08-05T06:16:00Z",
  "published": "2026-08-05T06:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-71190"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-71190"
    },
    {
      "type": "REPORT",
      "url": "https://security.openstack.org/ossa/OSSA-2026-031.html"
    },
    {
      "type": "REPORT",
      "url": "https://bugs.launchpad.net/swift/+bug/2158771"
    },
    {
      "type": "REPORT",
      "url": "https://launchpad.net/bugs/2158771"
    },
    {
      "type": "REPORT",
      "url": "https://openwall.com/lists/oss-security/2026/07/28/27"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "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",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-71190"
  ]
}

CVE-2026-71190 (GCVE-0-2026-71190)

Vulnerability from cvelistv5 – Published: 2026-08-05 04:54 – Updated: 2026-08-06 13:09

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.

Severity

8.7 (High)


                        
                          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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-1333 - Inefficient Regular Expression Complexity

Assigner

mitre

References

4 references

URL	Tags
https://launchpad.net/bugs/2158771	issue-tracking
https://openwall.com/lists/oss-security/2026/07/28/27	vendor-advisorymailing-list
https://security.openstack.org/ossa/OSSA-2026-031.html	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/0…

Impacted products

1 product

Vendor	Product	Version
OpenStack	Swift	Affected: 1.9.1 , < 2.35.4 (semver) Affected: 2.36.0 , < 2.36.3 (semver) Affected: 2.37.0 , < 2.37.3 (semver) Affected: 2.38.0 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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      {
        "providerMetadata": {
          "dateUpdated": "2026-08-05T18:32:08.027Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/08/05/19"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-71190",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-06T13:02:38.990835Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-06T13:09:17.168Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Swift",
          "repo": "https://opendev.org/openstack/swift",
          "vendor": "OpenStack",
          "versions": [
            {
              "lessThan": "2.35.4",
              "status": "affected",
              "version": "1.9.1",
              "versionType": "semver"
            },
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              "status": "affected",
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            },
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              "status": "affected",
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            },
            {
              "status": "affected",
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              "versionType": "semver"
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        }
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      "cpeApplicability": [
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              "cpeMatch": [
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                  "versionEndExcluding": "2.35.4",
                  "versionStartIncluding": "1.9.1",
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                },
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                  "versionEndExcluding": "2.36.3",
                  "versionStartIncluding": "2.36.0",
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                },
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                  "criteria": "cpe:2.3:a:openstack:swift:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "2.37.0",
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                  "versionStartIncluding": "2.38.0",
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      ],
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          "lang": "en",
          "value": "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."
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      ],
      "metrics": [
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            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
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            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
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            "subConfidentialityImpact": "NONE",
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            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
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            "vulnConfidentialityImpact": "NONE",
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              "cweId": "CWE-1333",
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        },
        {
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            "vendor-advisory",
            "mailing-list"
          ],
          "url": "https://openwall.com/lists/oss-security/2026/07/28/27"
        },
        {
          "tags": [
            "vendor-advisory"
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          "url": "https://security.openstack.org/ossa/OSSA-2026-031.html"
        }
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  "cveMetadata": {
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    "datePublished": "2026-08-05T04:54:03.020Z",
    "dateReserved": "2026-08-05T04:54:02.394Z",
    "dateUpdated": "2026-08-06T13:09:17.168Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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}

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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

ubuntu-cve-2026-71190

Vulnerability from osv_ubuntu

CVE-2026-71190 (GCVE-0-2026-71190)

Tags

Sightings

Nomenclature