CVE-2026-56339

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-15. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: Elevated riskExposed: 0

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

Capgo (Cap-go/capgo) before 12.128.2 contains an information disclosure vulnerability in the Supabase PostgREST SECURITY DEFINER RPC function public.rescind_invitation that allows unauthenticated attackers to enumerate organization existence. The function returns distinct error messages (NO_ORG vs NO_RIGHTS) when called with only a publishable API key, enabling attackers to discover valid organization IDs and increase the attack surface for targeted phishing or social engineering campaigns.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

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
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
38%
KEV
Not listed

Published

July 15, 2026

Last Modified

July 15, 2026

Advisory Details (2)

Auto-updated Jul 15, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

Capgo - Unauthenticated Organization Existence Enumeration via rescind_invitation RPC | Advisories | VulnCheck

https://www.vulncheck.com/advisories/capgo-unauthenticated-organization-existence-enumeration-via-rescind-invitation-rpc
github Patch Available🟡 PoC Available

Unauthenticated org existence oracle via public Supabase RPC public.rescind_invitation(email, org_id) (SECURITY DEFINER) · Advisory · Cap-go/capgo.app · GitHub

https://github.com/Cap-go/capgo/security/advisories/GHSA-8432-3cgm-vw5j

Vendor Advisories for CVE-2026-56339(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 20× in last 7d / 107× 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 144 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-56339?
CVE-2026-56339 is a high vulnerability published on July 15, 2026. Capgo (Cap-go/capgo) before 12.128.2 contains an information disclosure vulnerability in the Supabase PostgREST SECURITY DEFINER RPC function public.rescindinvitation that allows unauthenticated attackers to enumerate organization existence. The function returns distinct error messages (NOORG vs…
When was CVE-2026-56339 disclosed?
CVE-2026-56339 was first published in the National Vulnerability Database on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56339 actively exploited?
CVE-2026-56339 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 62.0% of all scored CVEs.
What is the CVSS score of CVE-2026-56339?
CVE-2026-56339 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-56339?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56339, 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.

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