CVE-2026-56249

HIGHPre-NVD 7.67.6—
EchelonGraph scoreMEDIUM 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
Trending — 3 sources updated this week
7.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.6Exploit: None knownExposed: 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(medium)
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 PROB
0%
EPSS %ILE
30%
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 7× in last 7d / 68× 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 211 total refreshes for this CVE.

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

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 0% probability of exploitation in the next 30 days, which ranks it in the top 70.4% of all scored CVEs.
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.

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