Vulnerability-Lookup

UBUNTU-CVE-2026-71190 (CVE-2026-71190)

Vulnerability from osv_ubuntu – Published: 2026-08-05 06:16 – Updated: 2026-08-05 06:16 – Source website

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"
          },
          {
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            "binary_version": "2.7.1-0ubuntu2"
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          {
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          {
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          },
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            "binary_name": "swift-proxy",
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        ]
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      "package": {
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      },
      "ranges": [
        {
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            {
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          "type": "ECOSYSTEM"
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      "versions": [
        "2.5.0-0ubuntu1",
        "2.7.0-0ubuntu2",
        "2.7.0-0ubuntu2.1",
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    },
    {
      "ecosystem_specific": {
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            "binary_name": "python-swift",
            "binary_version": "2.17.1-0ubuntu1"
          },
          {
            "binary_name": "swift",
            "binary_version": "2.17.1-0ubuntu1"
          },
          {
            "binary_name": "swift-account",
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      },
      "ranges": [
        {
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          ],
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        }
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      "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",
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            "binary_version": "2.25.2-0ubuntu1.1"
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          },
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            "binary_version": "2.25.2-0ubuntu1.1"
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      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "swift",
        "purl": "pkg:deb/ubuntu/swift@2.25.2-0ubuntu1.1?arch=source\u0026distro=focal"
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              "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"
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          {
            "binary_name": "swift",
            "binary_version": "2.29.2-0ubuntu1.1"
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          {
            "binary_name": "swift-account",
            "binary_version": "2.29.2-0ubuntu1.1"
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            "binary_name": "swift-proxy",
            "binary_version": "2.29.2-0ubuntu1.1"
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      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "swift",
        "purl": "pkg:deb/ubuntu/swift@2.29.2-0ubuntu1.1?arch=source\u0026distro=jammy"
      },
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        "2.28.0+git2021120815.1859f2e16-0ubuntu1",
        "2.28.0+git2021121320.876377435-0ubuntu1",
        "2.28.0+git2022011309.32da73f5c-0ubuntu1",
        "2.29.0+git2022030314.3ff3076ce-0ubuntu1",
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        "2.29.1-0ubuntu1",
        "2.29.2-0ubuntu1",
        "2.29.2-0ubuntu1.1"
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            "binary_version": "2.33.0-0ubuntu1.1"
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          {
            "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"
      },
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      "versions": [
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        "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 · CISA-ADP (v2.0.3)

Decision recorded 2026-08-06 13:02 UTC

CWE

CWE-1333 - Inefficient Regular Expression Complexity

Assigner

mitre mitre root

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) cpe:2.3:a:openstack:swift:::::::: cpe:2.3:a:openstack:swift:::::::: cpe:2.3:a:openstack:swift:::::::: cpe:2.3:a:openstack:swift::::::::

Show details on NVD website

JSON

To clipboard

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                    "Automatable": "yes"
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                "role": "CISA Coordinator",
                "timestamp": "2026-08-06T13:02:38.990835Z",
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        "title": "CISA ADP Vulnrichment"
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    "cna": {
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          "defaultStatus": "unaffected",
          "product": "Swift",
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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.

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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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UBUNTU-CVE-2026-71190 (CVE-2026-71190)

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

Tags

Sightings

Nomenclature

Related by attack behaviour