CVE-2026-77780Network attack vector

Cross-tenant banking disclosure via unscoped foreign keys

Published Aug 21, 2026 · Updated Aug 21, 2026

Authorization bypass in Roskus Prospero Flow CRM 4.9.1 through 5.14.0 allows remote authenticated users to disclose cross-tenant banking data. POST /transaction/save accepts attacker-selected bank_account_id or bank_card_id values, persists them, and later renders the referenced account or card without checking company ownership. Transaction and accounting creation permissions are required; exposure is limited to account and bank names and card last four digits.

CVSS severityUnavailable
Unscored
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Roskus Prospero Flow CRM 4.9.1 through 5.14.0 allows remote authenticated users to disclose cross-tenant banking data. POST /transaction/save accepts attacker-selected bank_account_id or bank_card_id values, persists them, and later renders the referenced account or card without checking company ownership. Transaction and accounting creation permissions are required; exposure is limited to account and bank names and card last four digits.

The record

CVE
CVE-2026-77780
Published
Aug 21, 2026
Updated
Aug 21, 2026
Vendor
Roskus
Product
Prospero Flow CRM
Classifications
CWE-639, T1213.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.9.1 <5.14.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Roskus · Prospero Flow CRMversion=4.9.1 <5.14.2

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1213.004Customer Relationship Management Software

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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