Vulnerability-Lookup

CVE-2026-77780 (GCVE-0-2026-77780)

Vulnerability from cvelistv5 – Published: 2026-08-21 12:12 – Updated: 2026-08-21 16:12 X_Open Source

Title

Unvalidated bank account and card foreign keys in the Prospero Flow CRM transaction save endpoint allow cross-tenant disclosure of banking identifiers

Summary

Authorization Bypass Through User-Controlled Key in the transaction save endpoint in Roskus Prospero Flow CRM 4.9.1 through 5.14.0 allows a user with transaction and accounting creation permissions to disclose another company's bank account name, bank name and card last four digits via a bank_account_id or bank_card_id belonging to that company in POST /transaction/save, which is persisted and rendered without any company ownership check.

Severity

5.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-21 15:56 UTC

CWE

CWE-639 - Authorization Bypass Through User-Controlled Key

Assigner

Secur0 INCIBE root

References

3 references

URL	Tags
https://github.com/Roskus/prospero-flow-crm/commi…	patch
https://github.com/Roskus/prospero-flow-crm/pull/261	issue-tracking
https://secur0.com/en/cna/cve-list/cve-2026-77780…	technical-descriptionthird-party-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
Roskus	Prospero Flow CRM	Affected: 4.9.1 , < 5.14.2 (semver) cpe:2.3:a:roskus:prospero_flow_crm::::::::

Date Public

2026-08-21 12:05

Credits

Adrián García López Xoán M. Otero Jorge Darío Rivas Quero Secur0 CNA Gustavo Novaro

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-77780

Vulnerability from fkie_nvd - Published: 2026-08-21 13:18 - Updated: 2026-08-21 16:18

Severity

5.3 (Medium) - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	4daa8cea-433a-44bd-9456-53b127fc289a	https://github.com/Roskus/prospero-flow-crm/commit/5fd1fe862bbdcbacf5d7e05c1c123981d8809674
	4daa8cea-433a-44bd-9456-53b127fc289a	https://github.com/Roskus/prospero-flow-crm/pull/261
	4daa8cea-433a-44bd-9456-53b127fc289a	https://secur0.com/en/cna/cve-list/cve-2026-77780-idor-unvalidated-bank-foreign-keys-prospero-transaction-save

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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  "lastModified": "2026-08-21T16:18:23.523",
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          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "LOW",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "4daa8cea-433a-44bd-9456-53b127fc289a",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-77780",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-21T15:56:49.202825Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-21T13:18:20.423",
  "references": [
    {
      "source": "4daa8cea-433a-44bd-9456-53b127fc289a",
      "url": "https://github.com/Roskus/prospero-flow-crm/commit/5fd1fe862bbdcbacf5d7e05c1c123981d8809674"
    },
    {
      "source": "4daa8cea-433a-44bd-9456-53b127fc289a",
      "url": "https://github.com/Roskus/prospero-flow-crm/pull/261"
    },
    {
      "source": "4daa8cea-433a-44bd-9456-53b127fc289a",
      "url": "https://secur0.com/en/cna/cve-list/cve-2026-77780-idor-unvalidated-bank-foreign-keys-prospero-transaction-save"
    }
  ],
  "sourceIdentifier": "4daa8cea-433a-44bd-9456-53b127fc289a",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-639"
        }
      ],
      "source": "4daa8cea-433a-44bd-9456-53b127fc289a",
      "type": "Secondary"
    }
  ]
}

GHSA-5V96-P23J-5MWQ

Vulnerability from github – Published: 2026-08-21 15:32 – Updated: 2026-08-21 15:32

Details

Severity

5.3 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2026-77780"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-639"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-21T13:18:20Z",
    "severity": "MODERATE"
  },
  "details": "Authorization Bypass Through User-Controlled Key in the transaction save endpoint in Roskus\nProspero Flow CRM 4.9.1 through 5.14.0 allows a user with transaction and accounting\ncreation permissions to disclose another company\u0027s bank account name, bank name and card\nlast four digits via a bank_account_id or bank_card_id belonging to that company in POST\n/transaction/save, which is persisted and rendered without any company ownership check.",
  "id": "GHSA-5v96-p23j-5mwq",
  "modified": "2026-08-21T15:32:12Z",
  "published": "2026-08-21T15:32:12Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-77780"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Roskus/prospero-flow-crm/pull/261"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Roskus/prospero-flow-crm/commit/5fd1fe862bbdcbacf5d7e05c1c123981d8809674"
    },
    {
      "type": "WEB",
      "url": "https://secur0.com/en/cna/cve-list/cve-2026-77780-idor-unvalidated-bank-foreign-keys-prospero-transaction-save"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

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.
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.

Action not permitted

CVE-2026-77780 (GCVE-0-2026-77780)

FKIE_CVE-2026-77780

GHSA-5V96-P23J-5MWQ

Tags

Sightings

Nomenclature