CVE-2026-56249

HIGHPre-NVD 7.67.6—
EchelonGraph scoreHIGH confidence

Score 7.6 from GitHub Security Advisory (severity: HIGH) published 2026-07-01. a secondary CVSS source baseline 7.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
7.6
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.6Exploit: NoneExposed: 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 an authorization bypass vulnerability in the channel creation endpoint that allows authenticated users to overwrite existing channels by reusing their names. Attackers with app.create_channel permission can exploit a logic mismatch between existence validation and upsert operations to reassign channel ownership and modify critical production channel configurations.

CVSS v3
7.6
EG Score
7.6(high)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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
Severity76% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
17.3%
KEV
Not listed

Published

July 1, 2026

Last Modified

July 1, 2026

Advisory Details (2)

Auto-updated Jul 3, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Unauthorized channel overwrite and ownership takeover via POST /channel name collision · Advisory · Cap-go/capgo · GitHub

https://github.com/Cap-go/capgo/security/advisories/GHSA-vj24-j594-3wv3
generic

Capgo - Unauthorized Channel Overwrite and Ownership Takeover via POST /channel Name Collision | Advisories | VulnCheck

https://www.vulncheck.com/advisories/capgo-unauthorized-channel-overwrite-and-ownership-takeover-via-post-channel-name-collision

Vendor Advisories for CVE-2026-56249(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 10× in last 7d / 72× 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. 2026-07-25 14:18 UTCEPSS rescore
  2. 2026-07-24 14:18 UTCEPSS rescore
  3. 2026-07-23 14:18 UTCEPSS rescore
  4. 2026-07-23 03:20 UTCEG score recompute
  5. 2026-07-22 14:08 UTCEPSS rescore
  6. 2026-07-21 15:25 UTCEPSS rescore
  7. 2026-07-20 17:08 UTCEPSS rescore
  8. 2026-07-19 14:31 UTCEPSS rescore
  9. 2026-07-19 14:31 UTCEPSS rescore
  10. 2026-07-19 02:29 UTCEPSS rescore
  11. 2026-07-18 10:04 UTCEPSS rescore
  12. 2026-07-16 22:21 UTCGHSA enrichment
  13. 2026-07-16 17:03 UTCEPSS rescore
  14. 2026-07-16 10:27 UTCGHSA enrichment
  15. 2026-07-15 22:34 UTCGHSA enrichment
  16. 2026-07-15 16:57 UTCEPSS rescore
  17. 2026-07-15 16:57 UTCEPSS rescore
  18. 2026-07-15 10:41 UTCGHSA enrichment
  19. 2026-07-15 02:00 UTCEPSS rescore
  20. 2026-07-15 02:00 UTCEPSS rescore
  21. 2026-07-14 22:38 UTCGHSA enrichment
  22. 2026-07-14 10:45 UTCGHSA enrichment
  23. 2026-07-13 22:43 UTCGHSA enrichment
  24. 2026-07-13 22:31 UTCEPSS rescore
  25. 2026-07-13 10:50 UTCGHSA enrichment
Show 47 more
  1. 2026-07-13 06:13 UTCEPSS rescore
  2. 2026-07-13 06:13 UTCEPSS rescore
  3. 2026-07-12 22:57 UTCGHSA enrichment
  4. 2026-07-12 11:04 UTCGHSA enrichment
  5. 2026-07-12 05:46 UTCEPSS rescore
  6. 2026-07-11 23:10 UTCGHSA enrichment
  7. 2026-07-11 11:15 UTCGHSA enrichment
  8. 2026-07-11 08:27 UTCEPSS rescore
  9. 2026-07-11 08:27 UTCEPSS rescore
  10. 2026-07-10 23:21 UTCGHSA enrichment
  11. 2026-07-10 11:28 UTCGHSA enrichment
  12. 2026-07-09 23:33 UTCGHSA enrichment
  13. 2026-07-09 19:10 UTCEPSS rescore
  14. 2026-07-09 19:10 UTCEPSS rescore
  15. 2026-07-09 11:39 UTCGHSA enrichment
  16. 2026-07-08 23:46 UTCGHSA enrichment
  17. 2026-07-08 15:16 UTCEPSS rescore
  18. 2026-07-08 15:16 UTCEPSS rescore
  19. 2026-07-08 11:53 UTCGHSA enrichment
  20. 2026-07-07 23:51 UTCGHSA enrichment
  21. 2026-07-07 13:46 UTCEPSS rescore
  22. 2026-07-07 13:46 UTCEPSS rescore
  23. 2026-07-07 11:58 UTCGHSA enrichment
  24. 2026-07-07 00:05 UTCGHSA enrichment
  25. 2026-07-06 16:27 UTCEPSS rescore
  26. 2026-07-06 16:27 UTCEPSS rescore
  27. 2026-07-06 12:11 UTCGHSA enrichment
  28. 2026-07-06 02:23 UTCEPSS rescore
  29. 2026-07-06 02:23 UTCEPSS rescore
  30. 2026-07-06 00:17 UTCGHSA enrichment
  31. 2026-07-05 12:22 UTCGHSA enrichment
  32. 2026-07-05 02:31 UTCEPSS rescore
  33. 2026-07-05 02:30 UTCEPSS rescore
  34. 2026-07-05 00:27 UTCGHSA enrichment
  35. 2026-07-04 12:34 UTCGHSA enrichment
  36. 2026-07-04 06:31 UTCEPSS rescore
  37. 2026-07-04 06:31 UTCEPSS rescore
  38. 2026-07-04 00:40 UTCGHSA enrichment
  39. 2026-07-03 12:47 UTCGHSA enrichment
  40. 2026-07-03 00:53 UTCGHSA enrichment
  41. 2026-07-02 13:00 UTCGHSA enrichment
  42. 2026-07-02 01:21 UTCNVD updateCVSS v4 → 7.2
  43. 2026-07-02 01:06 UTCGHSA enrichment
  44. 2026-07-01 15:07 UTCEPSS rescore
  45. 2026-07-01 13:13 UTCGHSA enrichment
  46. 2026-07-01 01:19 UTCEG score recompute
  47. 2026-07-01 01:19 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-56249?
CVE-2026-56249 is a high vulnerability published on July 1, 2026. Capgo before 12.128.2 contains an authorization bypass vulnerability in the channel creation endpoint that allows authenticated users to overwrite existing channels by reusing their names. Attackers with app.create_channel permission can exploit a logic mismatch between existence validation and…
When was CVE-2026-56249 disclosed?
CVE-2026-56249 was first published in the National Vulnerability Database on July 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56249 actively exploited?
CVE-2026-56249 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 17.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-56249?
CVE-2026-56249 has a CVSS v3 base score of 7.6 (NVD).
How do I remediate CVE-2026-56249?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56249, 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-2026-56249

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