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: 0.3%, top 75% 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
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%CVSS: 8.7Exploit: 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 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
8.7(medium)
EG Risk
54(Track)
EG Risk 54/100SSVC: 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
Severity87% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
25%
KEV
Not listed

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 27× in last 7d / 110× 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 115 total refreshes for this CVE.

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

Related CVEs(same CWE)

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 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-2026-77759 actively exploited?
CVE-2026-77759 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 74.8% of all scored CVEs.
What is the CVSS score of CVE-2026-77759?
CVE-2026-77759 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-77759?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-77759, 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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