CVE-2026-56252

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

Score 5.4 from GitHub Security Advisory published 2026-07-12. a secondary CVSS source baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.4Exploit: Elevated riskExposed: 0

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

Capgo before 12.128.2 contains a scope isolation vulnerability in the POST /webhooks/test endpoint that allows app-scoped API keys to invoke org-scoped webhook operations. Attackers with app-scoped credentials can trigger signed outbound webhook deliveries for arbitrary organization webhooks outside their declared app boundary, bypassing the limited_to_apps authorization check.

CVSS v3
5.4
EG Score
5.4(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity54% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

July 12, 2026

Last Modified

July 13, 2026

Advisory Details (2)

Auto-updated Jul 12, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

Capgo - Scope Isolation Failure in Webhook Test Endpoint | Advisories | VulnCheck

https://www.vulncheck.com/advisories/capgo-scope-isolation-failure-in-webhook-test-endpoint
github Patch Available🟡 PoC Available

App-scoped API keys can invoke org-scoped webhook test deliveries outside their app scope · Advisory · Cap-go/capgo · GitHub

https://github.com/Cap-go/capgo/security/advisories/GHSA-qvr7-f6j6-64wp

Vendor Advisories for CVE-2026-56252(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 14× 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 114 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-56252?
CVE-2026-56252 is a medium vulnerability published on July 12, 2026. Capgo before 12.128.2 contains a scope isolation vulnerability in the POST /webhooks/test endpoint that allows app-scoped API keys to invoke org-scoped webhook operations. Attackers with app-scoped credentials can trigger signed outbound webhook deliveries for arbitrary organization webhooks…
When was CVE-2026-56252 disclosed?
CVE-2026-56252 was first published in the National Vulnerability Database on July 12, 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-2026-56252 actively exploited?
CVE-2026-56252 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 79.7% of all scored CVEs.
What is the CVSS score of CVE-2026-56252?
CVE-2026-56252 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-56252?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56252, 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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