Vulnerability-Lookup

UBUNTU-CVE-2026-65059 (CVE-2026-65059)

Vulnerability from osv_ubuntu – Published: 2026-11-03 00:00 – Updated: 2026-11-03 00:00 – Source website

Details

Furl versions through 3.15 for Perl allow memory exhaustion via unbounded decompression of HTTP responses. Furl inflates a response body sent with a gzip, x-gzip or deflate Content-Encoding and appends the output to the response string with no size limit. It does this whether or not the request asked for compression, and no option caps the decompressed size. Responses read with write_file or write_code are streamed rather than held in memory. A malicious server, or an attacker on a plain HTTP connection, can send a small compressed response that expands to exhaust the client's memory and end the process.

Severity

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-65059	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-65059	REPORT
	https://lists.security.metacpan.org/cve-announce/…	REPORT
	https://github.com/tokuhirom/Furl/pull/139	REPORT
	https://metacpan.org/release/SYOHEX/Furl-3.15/sou…	REPORT
	http://www.openwall.com/lists/oss-security/2026/11/02/5	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libfurl-perl",
            "binary_version": "3.08-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "libfurl-perl",
        "purl": "pkg:deb/ubuntu/libfurl-perl@3.08-1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.06-2",
        "3.08-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libfurl-perl",
            "binary_version": "3.13-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "libfurl-perl",
        "purl": "pkg:deb/ubuntu/libfurl-perl@3.13-1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.08-2",
        "3.13-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libfurl-perl",
            "binary_version": "3.13-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "libfurl-perl",
        "purl": "pkg:deb/ubuntu/libfurl-perl@3.13-2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.13-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libfurl-perl",
            "binary_version": "3.14-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "libfurl-perl",
        "purl": "pkg:deb/ubuntu/libfurl-perl@3.14-2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.13-2",
        "3.14-1",
        "3.14-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libfurl-perl",
            "binary_version": "3.14-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libfurl-perl",
        "purl": "pkg:deb/ubuntu/libfurl-perl@3.14-2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.14-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libfurl-perl",
            "binary_version": "3.15-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.10",
        "name": "libfurl-perl",
        "purl": "pkg:deb/ubuntu/libfurl-perl@3.15-1?arch=source\u0026distro=stonking"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.15-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libfurl-perl",
            "binary_version": "3.15-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "libfurl-perl",
        "purl": "pkg:deb/ubuntu/libfurl-perl@3.15-1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.14-2",
        "3.15-1"
      ]
    }
  ],
  "aliases": [],
  "details": "Furl versions through 3.15 for Perl allow memory exhaustion via unbounded decompression of HTTP responses. Furl inflates a response body sent with a gzip, x-gzip or deflate Content-Encoding and appends the output to the response string with no size limit. It does this whether or not the request asked for compression, and no option caps the decompressed size. Responses read with write_file or write_code are streamed rather than held in memory. A malicious server, or an attacker on a plain HTTP connection, can send a small compressed response that expands to exhaust the client\u0027s memory and end the process.",
  "id": "UBUNTU-CVE-2026-65059",
  "modified": "2026-11-03T00:00:00Z",
  "published": "2026-11-03T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-65059"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-65059"
    },
    {
      "type": "REPORT",
      "url": "https://lists.security.metacpan.org/cve-announce/msg/44834406/"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/tokuhirom/Furl/pull/139"
    },
    {
      "type": "REPORT",
      "url": "https://metacpan.org/release/SYOHEX/Furl-3.15/source/lib/Furl/ZlibStream.pm"
    },
    {
      "type": "REPORT",
      "url": "http://www.openwall.com/lists/oss-security/2026/11/02/5"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-65059"
  ]
}

CVE-2026-65059 (GCVE-0-2026-65059)

Vulnerability from cvelistv5 – Published: 2026-11-02 17:01 – Updated: 2026-11-02 20:05

Title

Furl versions through 3.15 for Perl allow memory exhaustion via unbounded decompression of HTTP responses

Summary

Severity

No CVSS data available.

CWE

CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)

Assigner

CPANSec CNA under the redhat root

CNA scorecard C 62/100 over 369 records in the last 180 days details

References

3 references

URL	Tags
https://metacpan.org/release/SYOHEX/Furl-3.15/sou…	technical-description
https://github.com/tokuhirom/Furl/pull/139	issue-tracking
http://www.openwall.com/lists/oss-security/2026/11/02/5

Impacted products

1 product

Vendor	Product	Version
		Affected: 0 , ≤ 3.15 (custom)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-11-02T20:05:19.980Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/11/02/5"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "modules": [
            "Furl"
          ],
          "packageName": "Furl",
          "packageURL": "pkg:cpan/Furl",
          "programFiles": [
            "lib/Furl/HTTP.pm",
            "lib/Furl/ZlibStream.pm"
          ],
          "programRoutines": [
            {
              "name": "Furl::HTTP::request"
            },
            {
              "name": "Furl::ZlibStream::append"
            }
          ],
          "repo": "https://github.com/tokuhirom/Furl",
          "versions": [
            {
              "lessThanOrEqual": "3.15",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Furl versions through 3.15 for Perl allow memory exhaustion via unbounded decompression of HTTP responses.\n\nFurl inflates a response body sent with a gzip, x-gzip or deflate Content-Encoding and appends the output to the response string with no size limit. It does this whether or not the request asked for compression, and no option caps the decompressed size. Responses read with write_file or write_code are streamed rather than held in memory.\n\nA malicious server, or an attacker on a plain HTTP connection, can send a small compressed response that expands to exhaust the client\u0027s memory and end the process."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-409",
              "description": "CWE-409 Improper Handling of Highly Compressed Data (Data Amplification)",
              "lang": "en",
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        "dateUpdated": "2026-11-02T17:01:28.306Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
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      "references": [
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          "tags": [
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          ],
          "url": "https://metacpan.org/release/SYOHEX/Furl-3.15/source/lib/Furl/ZlibStream.pm"
        },
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/tokuhirom/Furl/pull/139"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "No fixed CPAN release is currently available."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Furl versions through 3.15 for Perl allow memory exhaustion via unbounded decompression of HTTP responses",
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-65059",
    "datePublished": "2026-11-02T17:01:28.306Z",
    "dateReserved": "2026-07-21T15:24:19.871Z",
    "dateUpdated": "2026-11-02T20:05:19.980Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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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

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