CVE-2026-77759

HIGHPre-NVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (41st 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
8.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 8.7Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Authorization Bypass Through User-Controlled Key in the transaction API in Roskus Prospero Flow CRM 5.0.0 through 5.3.5 allows an authenticated user to read the transactions of other companies on the same instance via an incremented identifier in GET /api/transaction/{id}, which is resolved without company scoping and without any permission check.

CVSS v3
8.7
EG Score
8.7HIGHmedium confidence
EG Risk
54
EG Risk 54/100CISA 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
Severity87% × 45%
Exploitation1% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
41st
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (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
Patch available. Sources: github_commit, github_release.
generic

CVE-2026-77759 · IDOR and missing authorization in the Prospero Flow CRM transaction API allow cross-tenant reading of financial records | Vulnerabilities published by Secur0

https://secur0.com/en/cna/cve-list/cve-2026-77759-idor-missing-authz-prospero-transaction-api
github_release Patch Available

v5.5.3 - Big security upgrade

Patch available: Roskus/prospero-flow-crm v5.5.3

https://github.com/Roskus/prospero-flow-crm/releases/tag/v5.5.3
github_commit Patch Available

commit 980c35ac00e4 (Roskus/prospero-flow-crm)

Patch available: Roskus/prospero-flow-crm v5.5.3 (contains commit 980c35ac00e4)

https://github.com/Roskus/prospero-flow-crm/commit/980c35ac00e419591a8adc2d1dbcc120ea62e273

Vendor Advisories for CVE-2026-77759(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 21× in last 7d / 105× 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 182 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 06:00 UTCEG score recompute
  4. 2026-10-09 06:00 UTCGHSA enrichment
  5. 2026-10-08 17:13 UTCEPSS rescore
  6. 2026-10-08 04:58 UTCEG score recompute
  7. 2026-10-08 04:57 UTCGHSA enrichment
  8. 2026-10-07 23:48 UTCEPSS rescore
  9. 2026-10-07 09:11 UTCGHSA enrichment
  10. 2026-10-06 21:18 UTCEG score recompute
  11. 2026-10-06 21:18 UTCGHSA enrichment
  12. 2026-10-06 15:18 UTCEPSS rescore
  13. 2026-10-06 08:24 UTCGHSA enrichment
  14. 2026-10-05 20:34 UTCEG score recompute
  15. 2026-10-05 20:34 UTCGHSA enrichment
  16. 2026-10-05 17:43 UTCEPSS rescore
  17. 2026-10-05 08:44 UTCEG score recompute
  18. 2026-10-05 08:44 UTCGHSA enrichment
  19. 2026-10-04 23:22 UTCEPSS rescore
  20. 2026-10-04 20:49 UTCGHSA enrichment
  21. 2026-10-04 05:03 UTCGHSA enrichment
  22. 2026-10-03 16:43 UTCEG score recompute
  23. 2026-10-03 16:43 UTCGHSA enrichment
  24. 2026-10-03 14:26 UTCEPSS rescore
  25. 2026-10-02 21:35 UTCEG score recompute
Show 75 more
  1. 2026-10-02 21:35 UTCGHSA enrichment
  2. 2026-10-02 09:15 UTCGHSA enrichment
  3. 2026-10-01 21:25 UTCEG score recompute
  4. 2026-10-01 21:25 UTCGHSA enrichment
  5. 2026-10-01 19:50 UTCEPSS rescore
  6. 2026-10-01 08:25 UTCGHSA enrichment
  7. 2026-09-30 20:28 UTCEG score recompute
  8. 2026-09-30 20:28 UTCGHSA enrichment
  9. 2026-09-30 07:57 UTCGHSA enrichment
  10. 2026-09-29 16:15 UTCEG score recompute
  11. 2026-09-29 16:15 UTCGHSA enrichment
  12. 2026-09-29 15:24 UTCEPSS rescore
  13. 2026-09-29 02:27 UTCEG score recompute
  14. 2026-09-29 02:27 UTCGHSA enrichment
  15. 2026-09-28 14:37 UTCEG score recompute
  16. 2026-09-28 14:37 UTCGHSA enrichment
  17. 2026-09-28 13:52 UTCEPSS rescore
  18. 2026-09-28 02:38 UTCGHSA enrichment
  19. 2026-09-27 14:44 UTCEG score recompute
  20. 2026-09-27 14:44 UTCGHSA enrichment
  21. 2026-09-27 13:48 UTCEPSS rescore
  22. 2026-09-27 02:31 UTCEG score recompute
  23. 2026-09-27 02:31 UTCGHSA enrichment
  24. 2026-09-26 15:59 UTCEPSS rescore
  25. 2026-09-26 00:28 UTCEPSS rescore
  26. 2026-09-25 12:25 UTCGHSA enrichment
  27. 2026-09-25 00:35 UTCEG score recompute
  28. 2026-09-25 00:35 UTCGHSA enrichment
  29. 2026-09-24 14:04 UTCEPSS rescore
  30. 2026-09-24 11:18 UTCGHSA enrichment
  31. 2026-09-23 23:28 UTCEG score recompute
  32. 2026-09-23 23:28 UTCGHSA enrichment
  33. 2026-09-23 17:54 UTCEPSS rescore
  34. 2026-09-23 11:32 UTCGHSA enrichment
  35. 2026-09-22 23:42 UTCEG score recompute
  36. 2026-09-22 23:42 UTCGHSA enrichment
  37. 2026-09-22 16:01 UTCEPSS rescore
  38. 2026-09-22 11:33 UTCGHSA enrichment
  39. 2026-09-21 23:43 UTCEG score recompute
  40. 2026-09-21 23:43 UTCGHSA enrichment
  41. 2026-09-21 21:09 UTCEPSS rescore
  42. 2026-09-21 11:52 UTCGHSA enrichment
  43. 2026-09-20 23:52 UTCEG score recompute
  44. 2026-09-20 23:52 UTCGHSA enrichment
  45. 2026-09-20 20:16 UTCEPSS rescore
  46. 2026-09-20 12:00 UTCGHSA enrichment
  47. 2026-09-19 23:36 UTCEG score recompute
  48. 2026-09-19 23:36 UTCGHSA enrichment
  49. 2026-09-19 11:45 UTCGHSA enrichment
  50. 2026-09-18 23:48 UTCEG score recompute
  51. 2026-09-18 23:48 UTCGHSA enrichment
  52. 2026-09-18 19:28 UTCEPSS rescore
  53. 2026-09-18 11:57 UTCGHSA enrichment
  54. 2026-09-18 00:07 UTCEG score recompute
  55. 2026-09-18 00:07 UTCGHSA enrichment
  56. 2026-09-17 11:47 UTCGHSA enrichment
  57. 2026-09-16 23:57 UTCEG score recompute
  58. 2026-09-16 23:57 UTCGHSA enrichment
  59. 2026-09-16 14:08 UTCEPSS rescore
  60. 2026-09-16 12:06 UTCEG score recompute
  61. 2026-09-16 12:06 UTCGHSA enrichment
  62. 2026-09-16 05:15 UTCEPSS rescore
  63. 2026-09-16 00:16 UTCGHSA enrichment
  64. 2026-09-15 12:25 UTCEG score recompute
  65. 2026-09-15 12:25 UTCGHSA enrichment
  66. 2026-09-15 03:12 UTCEPSS rescore
  67. 2026-09-15 03:12 UTCEPSS rescore
  68. 2026-09-15 00:34 UTCGHSA enrichment
  69. 2026-09-14 12:44 UTCGHSA enrichment
  70. 2026-09-14 00:50 UTCEG score recompute
  71. 2026-09-14 00:50 UTCGHSA enrichment
  72. 2026-09-13 13:00 UTCGHSA enrichment
  73. 2026-09-13 01:10 UTCEG score recompute
  74. 2026-09-13 01:10 UTCGHSA enrichment
  75. 2026-09-12 13:20 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2026-77759?
CVE-2026-77759 is a high vulnerability published on August 21, 2026. Authorization Bypass Through User-Controlled Key in the transaction API in Roskus Prospero Flow CRM 5.0.0 through 5.3.5 allows an authenticated user to read the transactions of other companies on the same instance via an incremented identifier in GET /api/transaction/{id}, which is resolved without…
When was CVE-2026-77759 disclosed?
CVE-2026-77759 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-2026-77759 actively exploited?
CVE-2026-77759 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (41st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-77759?
CVE-2026-77759 has a CVSS base score of 8.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-77759?
A fix for CVE-2026-77759 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-77759 are linked in the Vendor Advisories panel on this page.

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