CVE-2026-56252

MEDIUMPre-NVD 5.45.4
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

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, GitHub Security Advisory, a secondary CVSS source
Elevated
5.4EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.4Exploit: No code on recordExposed services: Not assessed

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

The CVE record's CNA (VulnCheck) lists Capgo versions before 12.128.2 as affected, and Capgo versions 12.128.2 as unaffected. No release containing a fix is confirmed on record.

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
5.4MEDIUMmedium confidence
EG Risk
40
EG Risk 40/100

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 (value × EchelonGraph’s weight)
Severity54% × 45%
The EG Score, 5.4 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.3%
EPSS %ILE
19th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 12, 2026

Last Modified

July 13, 2026

Advisory Details (2)

Auto-updated Jul 12, 2026
No fix on record yet. Sources: github.
Web page

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

https://www.vulncheck.com/advisories/capgo-scope-isolation-failure-in-webhook-test-endpoint
GitHub advisoryMentions a patch (unverified)

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 11× in last 7d / 40× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 175 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 75 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  3. 2026-10-12 15:55 UTCEG score recompute
  4. 2026-10-11 19:38 UTCEG score recompute
  5. 2026-10-11 16:53 UTCEG score recompute
  6. 2026-10-11 14:16 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  10. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  12. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  13. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  15. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  16. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  17. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  18. 2026-10-01 14:50 UTCEG score recompute
  19. 2026-10-01 14:50 UTCGHSA enrichmentGHSA-4w58-4949-9w2m · GitHub CVSS 5.4
  20. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  21. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  22. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  23. 2026-09-28 09:40 UTCEG score recompute
  24. 2026-09-28 09:40 UTCGHSA enrichmentGHSA-4w58-4949-9w2m · GitHub CVSS 5.4
  25. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 18th percentile
Show 75 more
  1. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  2. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  3. 2026-09-24 10:27 UTCEG score recompute
  4. 2026-09-24 10:27 UTCGHSA enrichmentGHSA-4w58-4949-9w2m · GitHub CVSS 5.4
  5. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  6. 2026-09-23 05:38 UTCEG score recompute
  7. 2026-09-23 05:38 UTCGHSA enrichmentGHSA-4w58-4949-9w2m · GitHub CVSS 5.4
  8. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  9. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  10. 2026-09-18 05:10 UTCEG score recompute
  11. 2026-09-18 05:10 UTCGHSA enrichmentGHSA-4w58-4949-9w2m · GitHub CVSS 5.4
  12. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  13. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  14. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  15. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  16. 2026-09-14 08:39 UTCEG score recompute
  17. 2026-09-14 08:39 UTCGHSA enrichmentGHSA-4w58-4949-9w2m · GitHub CVSS 5.4
  18. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  19. 2026-09-13 08:06 UTCEG score recompute
  20. 2026-09-13 08:06 UTCGHSA enrichmentGHSA-4w58-4949-9w2m · GitHub CVSS 5.4
  21. 2026-09-12 02:06 UTCEG score recompute
  22. 2026-09-12 02:06 UTCGHSA enrichmentGHSA-4w58-4949-9w2m · GitHub CVSS 5.4
  23. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  24. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  25. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  26. 2026-09-08 02:19 UTCEG score recompute
  27. 2026-09-08 02:19 UTCGHSA enrichmentGHSA-4w58-4949-9w2m · GitHub CVSS 5.4
  28. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  29. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  30. 2026-09-05 21:34 UTCEG score recompute
  31. 2026-09-05 21:34 UTCGHSA enrichmentGHSA-4w58-4949-9w2m · GitHub CVSS 5.4
  32. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  33. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  34. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  35. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  36. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  37. 2026-08-30 05:46 UTCEG score recompute
  38. 2026-08-30 05:46 UTCGHSA enrichmentGHSA-4w58-4949-9w2m · GitHub CVSS 5.4
  39. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  40. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  41. 2026-08-27 21:37 UTCEG score recompute
  42. 2026-08-27 21:37 UTCGHSA enrichmentGHSA-4w58-4949-9w2m · GitHub CVSS 5.4
  43. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  44. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  45. 2026-08-26 08:07 UTCEG score recompute
  46. 2026-08-26 08:06 UTCGHSA enrichmentGHSA-4w58-4949-9w2m · GitHub CVSS 5.4
  47. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  48. 2026-08-25 07:21 UTCEG score recompute
  49. 2026-08-25 07:20 UTCGHSA enrichmentGHSA-4w58-4949-9w2m · GitHub CVSS 5.4
  50. 2026-08-24 06:44 UTCGHSA enrichmentGHSA-4w58-4949-9w2m · GitHub CVSS 5.4
  51. 2026-08-23 06:10 UTCEG score recompute
  52. 2026-08-23 06:10 UTCGHSA enrichmentGHSA-4w58-4949-9w2m · GitHub CVSS 5.4
  53. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  54. 2026-08-22 05:36 UTCEG score recompute
  55. 2026-08-22 05:36 UTCGHSA enrichmentGHSA-4w58-4949-9w2m · GitHub CVSS 5.4
  56. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  57. 2026-08-21 05:01 UTCEG score recompute
  58. 2026-08-21 05:01 UTCGHSA enrichmentGHSA-4w58-4949-9w2m · GitHub CVSS 5.4
  59. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  60. 2026-08-20 04:28 UTCEG score recompute
  61. 2026-08-20 04:28 UTCGHSA enrichmentGHSA-4w58-4949-9w2m · GitHub CVSS 5.4
  62. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  63. 2026-08-19 03:54 UTCEG score recompute
  64. 2026-08-19 03:54 UTCGHSA enrichmentGHSA-4w58-4949-9w2m · GitHub CVSS 5.4
  65. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  66. 2026-08-18 02:49 UTCEG score recompute
  67. 2026-08-18 02:48 UTCGHSA enrichmentGHSA-4w58-4949-9w2m · GitHub CVSS 5.4
  68. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  69. 2026-08-16 23:43 UTCEG score recompute
  70. 2026-08-16 23:43 UTCGHSA enrichmentGHSA-4w58-4949-9w2m · GitHub CVSS 5.4
  71. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  72. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  73. 2026-08-15 23:10 UTCEG score recompute
  74. 2026-08-15 23:10 UTCGHSA enrichmentGHSA-4w58-4949-9w2m · GitHub CVSS 5.4
  75. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 6th percentile

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-56252?
CVE-2026-56252 is a medium-severity vulnerability; its CVE record was 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 made public?
CVE-2026-56252 was made public on May 7, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on July 12, 2026. EchelonGraph's copy of the record carries a last-modified date of July 13, 2026; the record at its source may have been updated since.
Is CVE-2026-56252 actively exploited?
CVE-2026-56252 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (19th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-56252?
CVE-2026-56252 has a CVSS base score of 5.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-56252?
No fix for CVE-2026-56252 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The CVE record's CNA (VulnCheck) lists Capgo versions before 12.128.2 as affected, and Capgo versions 12.128.2 as unaffected. No release containing a fix is confirmed on record. The vendor advisories EchelonGraph has for CVE-2026-56252 are linked in the Vendor Advisories panel on this page.

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