Vulnerability-Lookup

CVE-2026-119036 (GCVE-0-2026-119036)

Vulnerability from cvelistv5 – Published: 2026-10-30 12:56 – Updated: 2026-10-30 12:56

Title

Business::GoCardless versions before 1.01 for Perl allow memory exhaustion by flattening legacy webhook payloads before checking their signature

Summary

Business::GoCardless versions before 1.01 for Perl allow memory exhaustion by flattening legacy webhook payloads before checking their signature. A webhook body with a top-level "payload" key is verified as a legacy webhook. To rebuild the signed string, the payload is flattened into one key and value pair per leaf, each key carrying the full path to that leaf, and the pairs are then encoded, sorted and joined. A long key holding a long array costs memory proportional to the key length times the array length. A remote attacker can exhaust memory in the process receiving webhooks with a single request that carries no valid signature.

Severity

No CVSS data available.

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

CPANSec CNA under the redhat root

CNA scorecard C 62/100 over 343 records in the last 180 days details

References

1 reference

URL	Tags
https://metacpan.org/release/LEEJO/Business-GoCar…	release-notes

Impacted products

1 product

Vendor	Product	Version	CPE status
		Affected: 0 , < 1.01 (custom)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "modules": [
            "Business::GoCardless"
          ],
          "packageName": "Business-GoCardless",
          "packageURL": "pkg:cpan/Business-GoCardless",
          "programFiles": [
            "lib/Business/GoCardless/Utils.pm",
            "lib/Business/GoCardless/Webhook.pm"
          ],
          "programRoutines": [
            {
              "name": "Business::GoCardless::Pro::webhook"
            },
            {
              "name": "Business::GoCardless::Utils::signature_valid"
            }
          ],
          "repo": "https://github.com/payprop/business-gocardless",
          "versions": [
            {
              "lessThan": "1.01",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Business::GoCardless versions before 1.01 for Perl allow memory exhaustion by flattening legacy webhook payloads before checking their signature.\n\nA webhook body with a top-level \"payload\" key is verified as a legacy webhook. To rebuild the signed string, the payload is flattened into one key and value pair per leaf, each key carrying the full path to that leaf, and the pairs are then encoded, sorted and joined. A long key holding a long array costs memory proportional to the key length times the array length.\n\nA remote attacker can exhaust memory in the process receiving webhooks with a single request that carries no valid signature."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-770",
              "description": "CWE-770 Allocation of Resources Without Limits or Throttling",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-30T12:56:09.479Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/release/LEEJO/Business-GoCardless-1.01/changes"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to Business-GoCardless 1.01 or later."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Business::GoCardless versions before 1.01 for Perl allow memory exhaustion by flattening legacy webhook payloads before checking their signature",
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-119036",
    "datePublished": "2026-10-30T12:56:09.479Z",
    "dateReserved": "2026-10-29T11:38:31.744Z",
    "dateUpdated": "2026-10-30T12:56:09.479Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-119036",
      "date": "2026-10-31",
      "epss": "0.00176",
      "percentile": "0.07047"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "collectionURL": "https://cpan.org/modules",
                "defaultStatus": "unaffected",
                "modules": [
                  "Business::GoCardless"
                ],
                "packageName": "Business-GoCardless",
                "packageURL": "pkg:cpan/Business-GoCardless",
                "programFiles": [
                  "lib/Business/GoCardless/Utils.pm",
                  "lib/Business/GoCardless/Webhook.pm"
                ],
                "programRoutines": [
                  {
                    "name": "Business::GoCardless::Pro::webhook"
                  },
                  {
                    "name": "Business::GoCardless::Utils::signature_valid"
                  }
                ],
                "repo": "https://github.com/payprop/business-gocardless",
                "versions": [
                  {
                    "lessThan": "1.01",
                    "status": "affected",
                    "version": "0",
                    "versionType": "custom"
                  }
                ]
              }
            ],
            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Business::GoCardless versions before 1.01 for Perl allow memory exhaustion by flattening legacy webhook payloads before checking their signature.\n\nA webhook body with a top-level \"payload\" key is verified as a legacy webhook. To rebuild the signed string, the payload is flattened into one key and value pair per leaf, each key carrying the full path to that leaf, and the pairs are then encoded, sorted and joined. A long key holding a long array costs memory proportional to the key length times the array length.\n\nA remote attacker can exhaust memory in the process receiving webhooks with a single request that carries no valid signature."
          }
        ],
        "id": "CVE-2026-119036",
        "lastModified": "2026-10-30T17:13:54.187",
        "metrics": {},
        "published": "2026-10-30T13:18:32.553",
        "references": [
          {
            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
            "url": "https://metacpan.org/release/LEEJO/Business-GoCardless-1.01/changes"
          }
        ],
        "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "vulnStatus": "Deferred",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-770"
              }
            ],
            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
            "type": "Secondary"
          }
        ]
      }
    }
  }
}

FKIE_CVE-2026-119036

Vulnerability from fkie_nvd - Published: 2026-10-30 13:18 - Updated: 2026-10-30 17:13

Severity

Summary

References

	URL	Tags
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://metacpan.org/release/LEEJO/Business-GoCardless-1.01/changes

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "modules": [
            "Business::GoCardless"
          ],
          "packageName": "Business-GoCardless",
          "packageURL": "pkg:cpan/Business-GoCardless",
          "programFiles": [
            "lib/Business/GoCardless/Utils.pm",
            "lib/Business/GoCardless/Webhook.pm"
          ],
          "programRoutines": [
            {
              "name": "Business::GoCardless::Pro::webhook"
            },
            {
              "name": "Business::GoCardless::Utils::signature_valid"
            }
          ],
          "repo": "https://github.com/payprop/business-gocardless",
          "versions": [
            {
              "lessThan": "1.01",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Business::GoCardless versions before 1.01 for Perl allow memory exhaustion by flattening legacy webhook payloads before checking their signature.\n\nA webhook body with a top-level \"payload\" key is verified as a legacy webhook. To rebuild the signed string, the payload is flattened into one key and value pair per leaf, each key carrying the full path to that leaf, and the pairs are then encoded, sorted and joined. A long key holding a long array costs memory proportional to the key length times the array length.\n\nA remote attacker can exhaust memory in the process receiving webhooks with a single request that carries no valid signature."
    }
  ],
  "id": "CVE-2026-119036",
  "lastModified": "2026-10-30T17:13:54.187",
  "metrics": {},
  "published": "2026-10-30T13:18:32.553",
  "references": [
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "url": "https://metacpan.org/release/LEEJO/Business-GoCardless-1.01/changes"
    }
  ],
  "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-770"
        }
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "type": "Secondary"
    }
  ]
}

GHSA-F3JH-6HRJ-XX6P

Vulnerability from github – Published: 2026-10-30 15:34 – Updated: 2026-10-30 15:34

Details

Business::GoCardless versions before 1.01 for Perl allow memory exhaustion by flattening legacy webhook payloads before checking their signature.

A webhook body with a top-level "payload" key is verified as a legacy webhook. To rebuild the signed string, the payload is flattened into one key and value pair per leaf, each key carrying the full path to that leaf, and the pairs are then encoded, sorted and joined. A long key holding a long array costs memory proportional to the key length times the array length.

A remote attacker can exhaust memory in the process receiving webhooks with a single request that carries no valid signature.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-119036"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-770"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-30T13:18:32Z",
    "severity": null
  },
  "details": "Business::GoCardless versions before 1.01 for Perl allow memory exhaustion by flattening legacy webhook payloads before checking their signature.\n\nA webhook body with a top-level \"payload\" key is verified as a legacy webhook. To rebuild the signed string, the payload is flattened into one key and value pair per leaf, each key carrying the full path to that leaf, and the pairs are then encoded, sorted and joined. A long key holding a long array costs memory proportional to the key length times the array length.\n\nA remote attacker can exhaust memory in the process receiving webhooks with a single request that carries no valid signature.",
  "id": "GHSA-f3jh-6hrj-xx6p",
  "modified": "2026-10-30T15:34:31Z",
  "published": "2026-10-30T15:34:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-119036"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/LEEJO/Business-GoCardless-1.01/changes"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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.

Vulnerability timeline

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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.

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Action not permitted

CVE-2026-119036 (GCVE-0-2026-119036)

FKIE_CVE-2026-119036

GHSA-F3JH-6HRJ-XX6P

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