CVE-2026-56296

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-07-11. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
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: Elevated riskExposed: 0

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

Cap-go before 12.128.2 contains an information disclosure vulnerability in the public.transfer_app RPC function that returns distinct error messages for existing versus non-existing app IDs. Unauthenticated attackers can enumerate valid app IDs by observing error message differences when calling transfer_app with only the publishable API key.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
55(Attend)
EG Risk 55/100SSVC: 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
Severity53% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
29%
KEV
Not listed

Published

July 11, 2026

Last Modified

July 13, 2026

Advisory Details (2)

Auto-updated Jul 11, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

Cap-go - App Existence Oracle via Unauthenticated transfer_app RPC | Advisories | VulnCheck

https://www.vulncheck.com/advisories/cap-go-app-existence-oracle-via-unauthenticated-transfer-app-rpc
github Patch Available🟡 PoC Available

Unauthenticated app existence oracle via public.transfer_app RPC (distinct errors for existing vs non-existing app_id) · Advisory · Cap-go/capgo · GitHub

https://github.com/Cap-go/capgo/security/advisories/GHSA-fmm3-3qcg-85j6

Vendor Advisories for CVE-2026-56296(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 19× in last 7d / 82× 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 113 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-56296?
CVE-2026-56296 is a medium vulnerability published on July 11, 2026. Cap-go before 12.128.2 contains an information disclosure vulnerability in the public.transferapp RPC function that returns distinct error messages for existing versus non-existing app IDs. Unauthenticated attackers can enumerate valid app IDs by observing error message differences when calling…
When was CVE-2026-56296 disclosed?
CVE-2026-56296 was first published in the National Vulnerability Database on July 11, 2026, with the most recent update on July 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56296 actively exploited?
CVE-2026-56296 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 71.4% of all scored CVEs.
What is the CVSS score of CVE-2026-56296?
CVE-2026-56296 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-56296?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56296, 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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