CVE-2026-56252

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreHIGH 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(high)
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
7%
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 17× in last 7d / 38× 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.

  1. 2026-07-30 16:28 UTCEPSS rescore
  2. 2026-07-30 14:16 UTCEG score recompute
  3. 2026-07-30 14:15 UTCGHSA enrichment
  4. 2026-07-30 01:30 UTCEPSS rescore
  5. 2026-07-30 01:30 UTCEPSS rescore
  6. 2026-07-29 13:41 UTCEG score recompute
  7. 2026-07-29 13:41 UTCGHSA enrichment
  8. 2026-07-28 15:37 UTCEPSS rescore
  9. 2026-07-28 13:08 UTCEG score recompute
  10. 2026-07-28 13:07 UTCGHSA enrichment
  11. 2026-07-27 12:34 UTCEG score recompute
  12. 2026-07-27 12:34 UTCGHSA enrichment
  13. 2026-07-26 14:54 UTCEPSS rescore
  14. 2026-07-26 12:01 UTCEG score recompute
  15. 2026-07-26 12:01 UTCGHSA enrichment
  16. 2026-07-25 14:18 UTCEPSS rescore
  17. 2026-07-24 14:18 UTCEPSS rescore
  18. 2026-07-23 14:18 UTCEPSS rescore
  19. 2026-07-23 03:20 UTCEG score recompute
  20. 2026-07-22 14:08 UTCEPSS rescore
  21. 2026-07-21 15:25 UTCEPSS rescore
  22. 2026-07-20 17:08 UTCEPSS rescore
  23. 2026-07-19 14:31 UTCEPSS rescore
  24. 2026-07-19 14:31 UTCEPSS rescore
  25. 2026-07-19 02:29 UTCEPSS rescore
Show 13 more
  1. 2026-07-18 10:04 UTCEPSS rescore
  2. 2026-07-16 17:03 UTCEPSS rescore
  3. 2026-07-16 14:27 UTCGHSA enrichment
  4. 2026-07-15 16:57 UTCEPSS rescore
  5. 2026-07-15 16:57 UTCEPSS rescore
  6. 2026-07-15 13:54 UTCGHSA enrichment
  7. 2026-07-15 02:00 UTCEPSS rescore
  8. 2026-07-15 02:00 UTCEPSS rescore
  9. 2026-07-14 13:19 UTCGHSA enrichment
  10. 2026-07-13 22:31 UTCEPSS rescore
  11. 2026-07-13 12:46 UTCGHSA enrichment
  12. 2026-07-12 12:13 UTCEG score recompute
  13. 2026-07-12 12:12 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

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 93.4% 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

Explore the affected products and dependency analysis for CVE-2026-56252

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