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: 0.4% (36th percentile of EPSS-scored CVEs). 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: 0.4%CVSS: 5.3Exploit: None knownExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

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
5.3MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100CISA SSVC

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%
CISA SSVC: Track at every mission impact level.
Action: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.
EPSS PROB
0.4%
EPSS %ILE
36th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

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 16× in last 7d / 76× 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.

Showing the most recent 100 of 135 total refreshes for this CVE.

  1. 2026-10-10 20:00 UTCEPSS rescore
  2. 2026-10-09 20:07 UTCEPSS rescore
  3. 2026-10-09 05:59 UTCEG score recompute
  4. 2026-10-09 05:59 UTCGHSA enrichment
  5. 2026-10-08 17:13 UTCEPSS rescore
  6. 2026-10-08 04:57 UTCEG score recompute
  7. 2026-10-08 04:57 UTCGHSA enrichment
  8. 2026-10-07 23:48 UTCEPSS rescore
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  10. 2026-10-07 03:49 UTCGHSA enrichment
  11. 2026-10-06 15:18 UTCEPSS rescore
  12. 2026-10-06 03:06 UTCEG score recompute
  13. 2026-10-06 03:06 UTCGHSA enrichment
  14. 2026-10-05 17:43 UTCEPSS rescore
  15. 2026-10-04 23:22 UTCEPSS rescore
  16. 2026-10-04 20:49 UTCGHSA enrichment
  17. 2026-10-03 16:43 UTCEG score recompute
  18. 2026-10-03 16:43 UTCGHSA enrichment
  19. 2026-10-03 14:26 UTCEPSS rescore
  20. 2026-10-02 09:12 UTCEG score recompute
  21. 2026-10-02 09:12 UTCGHSA enrichment
  22. 2026-10-01 19:50 UTCEPSS rescore
  23. 2026-10-01 08:27 UTCEG score recompute
  24. 2026-10-01 08:27 UTCGHSA enrichment
  25. 2026-09-30 07:56 UTCEG score recompute
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  1. 2026-09-30 07:56 UTCGHSA enrichment
  2. 2026-09-29 15:24 UTCEPSS rescore
  3. 2026-09-29 03:44 UTCEG score recompute
  4. 2026-09-29 03:44 UTCGHSA enrichment
  5. 2026-09-28 13:52 UTCEPSS rescore
  6. 2026-09-28 03:06 UTCEG score recompute
  7. 2026-09-28 03:06 UTCGHSA enrichment
  8. 2026-09-27 13:48 UTCEPSS rescore
  9. 2026-09-27 02:31 UTCEG score recompute
  10. 2026-09-27 02:31 UTCGHSA enrichment
  11. 2026-09-26 15:59 UTCEPSS rescore
  12. 2026-09-26 00:28 UTCEPSS rescore
  13. 2026-09-25 11:48 UTCEG score recompute
  14. 2026-09-25 11:48 UTCGHSA enrichment
  15. 2026-09-24 14:04 UTCEPSS rescore
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  17. 2026-09-24 11:00 UTCGHSA enrichment
  18. 2026-09-23 17:54 UTCEPSS rescore
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  20. 2026-09-23 10:29 UTCGHSA enrichment
  21. 2026-09-22 16:01 UTCEPSS rescore
  22. 2026-09-22 09:57 UTCEG score recompute
  23. 2026-09-22 09:57 UTCGHSA enrichment
  24. 2026-09-21 21:09 UTCEPSS rescore
  25. 2026-09-21 09:26 UTCEG score recompute
  26. 2026-09-21 09:26 UTCGHSA enrichment
  27. 2026-09-20 20:16 UTCEPSS rescore
  28. 2026-09-20 08:55 UTCEG score recompute
  29. 2026-09-20 08:55 UTCGHSA enrichment
  30. 2026-09-19 07:56 UTCEG score recompute
  31. 2026-09-19 07:56 UTCGHSA enrichment
  32. 2026-09-18 19:28 UTCEPSS rescore
  33. 2026-09-18 07:25 UTCEG score recompute
  34. 2026-09-18 07:25 UTCGHSA enrichment
  35. 2026-09-17 06:53 UTCEG score recompute
  36. 2026-09-17 06:53 UTCGHSA enrichment
  37. 2026-09-16 14:08 UTCEPSS rescore
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  39. 2026-09-16 06:15 UTCGHSA enrichment
  40. 2026-09-16 05:15 UTCEPSS rescore
  41. 2026-09-15 05:44 UTCEG score recompute
  42. 2026-09-15 05:44 UTCGHSA enrichment
  43. 2026-09-15 03:12 UTCEPSS rescore
  44. 2026-09-15 03:12 UTCEPSS rescore
  45. 2026-09-14 04:42 UTCEG score recompute
  46. 2026-09-14 04:42 UTCGHSA enrichment
  47. 2026-09-13 04:11 UTCEG score recompute
  48. 2026-09-13 04:11 UTCGHSA enrichment
  49. 2026-09-12 03:38 UTCEG score recompute
  50. 2026-09-12 03:38 UTCGHSA enrichment
  51. 2026-09-11 14:53 UTCEPSS rescore
  52. 2026-09-11 03:07 UTCEG score recompute
  53. 2026-09-11 03:06 UTCGHSA enrichment
  54. 2026-09-10 09:35 UTCEPSS rescore
  55. 2026-09-10 02:35 UTCGHSA enrichment
  56. 2026-09-09 02:04 UTCEG score recompute
  57. 2026-09-09 02:04 UTCGHSA enrichment
  58. 2026-09-08 22:01 UTCEPSS rescore
  59. 2026-09-08 01:31 UTCEG score recompute
  60. 2026-09-08 01:31 UTCGHSA enrichment
  61. 2026-09-07 00:59 UTCEG score recompute
  62. 2026-09-07 00:59 UTCGHSA enrichment
  63. 2026-09-06 13:48 UTCEPSS rescore
  64. 2026-09-06 00:22 UTCEG score recompute
  65. 2026-09-06 00:22 UTCGHSA enrichment
  66. 2026-09-04 23:49 UTCEG score recompute
  67. 2026-09-04 23:49 UTCGHSA enrichment
  68. 2026-09-04 05:07 UTCEPSS rescore
  69. 2026-09-03 22:15 UTCGHSA enrichment
  70. 2026-09-02 21:42 UTCEG score recompute
  71. 2026-09-02 21:42 UTCGHSA enrichment
  72. 2026-09-02 14:12 UTCEPSS rescore
  73. 2026-09-01 21:03 UTCEG score recompute
  74. 2026-09-01 21:03 UTCGHSA enrichment
  75. 2026-09-01 13:54 UTCEPSS rescore

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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 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 0.4% probability of exploitation in the next 30 days (36th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-77780?
CVE-2026-77780 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-77780?
An upstream fix for CVE-2026-77780 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-77780 are linked in the Vendor Advisories panel on this page.

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