CVE-2026-77780

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 83% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
24(Track)
EG Risk 24/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity53% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
17%
KEV
Not listed

Published

August 21, 2026

Last Modified

September 1, 2026

Advisory Details (3)

Auto-updated Aug 21, 2026
Upstream fix merged — awaiting tagged release. Sources: github_pr, github_commit.
generic

CVE-2026-77780 · Unvalidated bank account and card foreign keys in the Prospero Flow CRM transaction save endpoint allow cross-tenant disclosure of banking identifiers | Vulnerabilities published by Secur0

https://secur0.com/en/cna/cve-list/cve-2026-77780-idor-unvalidated-bank-foreign-keys-prospero-transaction-save
github_pr

fix: validate company ownership of foreign keys on transaction save

Fix merged in Roskus/prospero-flow-crm PR #261 on 2026-07-27 — awaiting tagged release

https://github.com/Roskus/prospero-flow-crm/pull/261
github_commit

commit 5fd1fe862bbd (Roskus/prospero-flow-crm)

Fix landed in Roskus/prospero-flow-crm commit 5fd1fe862bbd — awaiting tagged release

https://github.com/Roskus/prospero-flow-crm/commit/5fd1fe862bbdcbacf5d7e05c1c123981d8809674

Vendor Advisories for CVE-2026-77780(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 18× in last 7d / 79× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-20 20:16 UTCEPSS rescore
  2. 2026-09-20 08:55 UTCEG score recompute
  3. 2026-09-20 08:55 UTCGHSA enrichment
  4. 2026-09-19 07:56 UTCEG score recompute
  5. 2026-09-19 07:56 UTCGHSA enrichment
  6. 2026-09-18 19:28 UTCEPSS rescore
  7. 2026-09-18 07:25 UTCEG score recompute
  8. 2026-09-18 07:25 UTCGHSA enrichment
  9. 2026-09-17 06:53 UTCEG score recompute
  10. 2026-09-17 06:53 UTCGHSA enrichment
  11. 2026-09-16 14:08 UTCEPSS rescore
  12. 2026-09-16 06:15 UTCEG score recompute
  13. 2026-09-16 06:15 UTCGHSA enrichment
  14. 2026-09-16 05:15 UTCEPSS rescore
  15. 2026-09-15 05:44 UTCEG score recompute
  16. 2026-09-15 05:44 UTCGHSA enrichment
  17. 2026-09-15 03:12 UTCEPSS rescore
  18. 2026-09-15 03:12 UTCEPSS rescore
  19. 2026-09-14 04:42 UTCEG score recompute
  20. 2026-09-14 04:42 UTCGHSA enrichment
  21. 2026-09-13 04:11 UTCEG score recompute
  22. 2026-09-13 04:11 UTCGHSA enrichment
  23. 2026-09-12 03:38 UTCEG score recompute
  24. 2026-09-12 03:38 UTCGHSA enrichment
  25. 2026-09-11 14:53 UTCEPSS rescore
Show 59 more
  1. 2026-09-11 03:07 UTCEG score recompute
  2. 2026-09-11 03:06 UTCGHSA enrichment
  3. 2026-09-10 09:35 UTCEPSS rescore
  4. 2026-09-10 02:35 UTCGHSA enrichment
  5. 2026-09-09 02:04 UTCEG score recompute
  6. 2026-09-09 02:04 UTCGHSA enrichment
  7. 2026-09-08 22:01 UTCEPSS rescore
  8. 2026-09-08 01:31 UTCEG score recompute
  9. 2026-09-08 01:31 UTCGHSA enrichment
  10. 2026-09-07 00:59 UTCEG score recompute
  11. 2026-09-07 00:59 UTCGHSA enrichment
  12. 2026-09-06 13:48 UTCEPSS rescore
  13. 2026-09-06 00:22 UTCEG score recompute
  14. 2026-09-06 00:22 UTCGHSA enrichment
  15. 2026-09-04 23:49 UTCEG score recompute
  16. 2026-09-04 23:49 UTCGHSA enrichment
  17. 2026-09-04 05:07 UTCEPSS rescore
  18. 2026-09-03 22:15 UTCGHSA enrichment
  19. 2026-09-02 21:42 UTCEG score recompute
  20. 2026-09-02 21:42 UTCGHSA enrichment
  21. 2026-09-02 14:12 UTCEPSS rescore
  22. 2026-09-01 21:03 UTCEG score recompute
  23. 2026-09-01 21:03 UTCGHSA enrichment
  24. 2026-09-01 13:54 UTCEPSS rescore
  25. 2026-09-01 04:40 UTCEPSS rescore
  26. 2026-09-01 04:40 UTCEPSS rescore
  27. 2026-09-01 02:44 UTCGHSA enrichment
  28. 2026-08-31 02:11 UTCEG score recompute
  29. 2026-08-31 02:11 UTCGHSA enrichment
  30. 2026-08-30 19:18 UTCEPSS rescore
  31. 2026-08-30 19:17 UTCEPSS rescore
  32. 2026-08-30 01:39 UTCEG score recompute
  33. 2026-08-30 01:39 UTCGHSA enrichment
  34. 2026-08-30 01:22 UTCEPSS rescore
  35. 2026-08-29 01:08 UTCEG score recompute
  36. 2026-08-29 01:07 UTCGHSA enrichment
  37. 2026-08-28 21:42 UTCEPSS rescore
  38. 2026-08-27 19:26 UTCEG score recompute
  39. 2026-08-27 19:26 UTCGHSA enrichment
  40. 2026-08-27 14:25 UTCEPSS rescore
  41. 2026-08-26 18:55 UTCEG score recompute
  42. 2026-08-26 18:55 UTCGHSA enrichment
  43. 2026-08-26 14:47 UTCEPSS rescore
  44. 2026-08-25 18:24 UTCEG score recompute
  45. 2026-08-25 18:24 UTCGHSA enrichment
  46. 2026-08-25 13:49 UTCEPSS rescore
  47. 2026-08-24 17:53 UTCEG score recompute
  48. 2026-08-24 17:53 UTCGHSA enrichment
  49. 2026-08-24 14:18 UTCEPSS rescore
  50. 2026-08-23 17:22 UTCEG score recompute
  51. 2026-08-23 17:22 UTCGHSA enrichment
  52. 2026-08-23 00:19 UTCEPSS rescore
  53. 2026-08-22 16:51 UTCEG score recompute
  54. 2026-08-22 16:51 UTCGHSA enrichment
  55. 2026-08-21 16:20 UTCEG score recompute
  56. 2026-08-21 16:20 UTCGHSA enrichment
  57. 2026-08-21 13:20 UTCEG score recompute
  58. 2026-08-21 12:30 UTCEG score recompute
  59. 2026-08-21 12:29 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-77780?
CVE-2026-77780 is a medium vulnerability published on August 21, 2026. 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…
When was CVE-2026-77780 disclosed?
CVE-2026-77780 was first published in the National Vulnerability Database on August 21, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-77780 actively exploited?
CVE-2026-77780 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 83.0% of all scored CVEs.
What is the CVSS score of CVE-2026-77780?
CVE-2026-77780 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-77780?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-77780, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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