CVE-2026-86840

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreHIGH confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-08. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: Elevated riskExposed: 0

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

The vtoken-minting and slpx pallets in Bifrost contain an improper authorization vulnerability in channel commission attribution. A signed account can supply an arbitrary registered channel_id when minting tokens without verifying that the caller is authorized to mint on behalf of that channel. This allows an attacker to inflate a channel's recorded mint volume and cause protocol commission payments to be disproportionately distributed to that channel during commission settlement.

CVSS v3
9.1
EG Score
9.1(high)
EG Risk
72(Attend)
EG Risk 72/100SSVC: Attend

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
Severity91% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
16%
KEV
Not listed

Published

September 8, 2026

Last Modified

September 10, 2026

Advisory Details (2)

Auto-updated Sep 15, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Bifrost Protocol — Unvalidated channel_id Allows Arbitrary Commission Share Inflation · GitHub

https://gist.github.com/prasanna8585/ffd112b1a125ca4c5533fdce45ef57c1
generic

What are vTokens? | Bifrost Docs

https://docs.bifrost.io/faq/what-are-vtokens

Vendor Advisories for CVE-2026-86840(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 55× in last 7d / 83× 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. 2026-09-20 03:46 UTCGHSA enrichment
  2. 2026-09-19 23:50 UTCGHSA enrichment
  3. 2026-09-19 19:55 UTCGHSA enrichment
  4. 2026-09-19 15:59 UTCEG score recompute
  5. 2026-09-19 15:59 UTCGHSA enrichment
  6. 2026-09-19 11:58 UTCGHSA enrichment
  7. 2026-09-19 08:02 UTCGHSA enrichment
  8. 2026-09-19 04:06 UTCGHSA enrichment
  9. 2026-09-19 00:11 UTCGHSA enrichment
  10. 2026-09-18 20:15 UTCEG score recompute
  11. 2026-09-18 20:15 UTCGHSA enrichment
  12. 2026-09-18 19:28 UTCEPSS rescore
  13. 2026-09-18 16:14 UTCGHSA enrichment
  14. 2026-09-18 12:03 UTCGHSA enrichment
  15. 2026-09-18 08:07 UTCGHSA enrichment
  16. 2026-09-18 04:11 UTCGHSA enrichment
  17. 2026-09-18 00:15 UTCGHSA enrichment
  18. 2026-09-17 20:19 UTCEG score recompute
  19. 2026-09-17 20:19 UTCGHSA enrichment
  20. 2026-09-17 19:32 UTCEPSS rescore
  21. 2026-09-17 14:44 UTCGHSA enrichment
  22. 2026-09-17 10:48 UTCGHSA enrichment
  23. 2026-09-17 06:52 UTCGHSA enrichment
  24. 2026-09-17 02:57 UTCGHSA enrichment
  25. 2026-09-16 22:27 UTCGHSA enrichment
Show 58 more
  1. 2026-09-16 18:17 UTCEG score recompute
  2. 2026-09-16 18:17 UTCGHSA enrichment
  3. 2026-09-16 14:09 UTCEPSS rescore
  4. 2026-09-16 13:57 UTCGHSA enrichment
  5. 2026-09-16 10:01 UTCGHSA enrichment
  6. 2026-09-16 06:05 UTCEG score recompute
  7. 2026-09-16 06:05 UTCGHSA enrichment
  8. 2026-09-16 05:15 UTCEPSS rescore
  9. 2026-09-16 02:09 UTCGHSA enrichment
  10. 2026-09-15 22:13 UTCGHSA enrichment
  11. 2026-09-15 18:17 UTCGHSA enrichment
  12. 2026-09-15 14:00 UTCGHSA enrichment
  13. 2026-09-15 10:04 UTCGHSA enrichment
  14. 2026-09-15 06:07 UTCEG score recompute
  15. 2026-09-15 06:07 UTCGHSA enrichment
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-15 03:12 UTCEPSS rescore
  18. 2026-09-15 02:11 UTCGHSA enrichment
  19. 2026-09-14 22:16 UTCGHSA enrichment
  20. 2026-09-14 18:20 UTCGHSA enrichment
  21. 2026-09-14 14:18 UTCGHSA enrichment
  22. 2026-09-14 10:22 UTCGHSA enrichment
  23. 2026-09-14 06:26 UTCGHSA enrichment
  24. 2026-09-14 02:31 UTCGHSA enrichment
  25. 2026-09-13 22:35 UTCGHSA enrichment
  26. 2026-09-13 18:40 UTCEG score recompute
  27. 2026-09-13 18:40 UTCGHSA enrichment
  28. 2026-09-13 14:44 UTCGHSA enrichment
  29. 2026-09-13 10:46 UTCGHSA enrichment
  30. 2026-09-13 06:50 UTCGHSA enrichment
  31. 2026-09-13 02:46 UTCGHSA enrichment
  32. 2026-09-12 22:51 UTCGHSA enrichment
  33. 2026-09-12 18:55 UTCEG score recompute
  34. 2026-09-12 18:55 UTCGHSA enrichment
  35. 2026-09-12 15:00 UTCGHSA enrichment
  36. 2026-09-12 11:04 UTCGHSA enrichment
  37. 2026-09-12 07:05 UTCGHSA enrichment
  38. 2026-09-12 03:09 UTCGHSA enrichment
  39. 2026-09-11 23:13 UTCGHSA enrichment
  40. 2026-09-11 19:01 UTCGHSA enrichment
  41. 2026-09-11 15:00 UTCEG score recompute
  42. 2026-09-11 15:00 UTCGHSA enrichment
  43. 2026-09-11 14:53 UTCEPSS rescore
  44. 2026-09-11 14:53 UTCEPSS rescore
  45. 2026-09-11 11:04 UTCEG score recompute
  46. 2026-09-11 11:04 UTCGHSA enrichment
  47. 2026-09-11 07:08 UTCGHSA enrichment
  48. 2026-09-11 03:13 UTCGHSA enrichment
  49. 2026-09-10 23:17 UTCEG score recompute
  50. 2026-09-10 23:17 UTCGHSA enrichment
  51. 2026-09-10 19:21 UTCGHSA enrichment
  52. 2026-09-10 18:35 UTCEG score recompute▲ 9.10
  53. 2026-09-10 18:35 UTCGHSA enrichment
  54. 2026-09-10 18:35 UTCMITRE cvelistV5CVSS v3 → 9.1 · severity → CRITICAL
  55. 2026-09-08 19:49 UTCGHSA enrichment
  56. 2026-09-08 16:28 UTCNVD update
  57. 2026-09-08 15:37 UTCEG score recompute
  58. 2026-09-08 15:34 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-86840?
CVE-2026-86840 is a critical vulnerability published on September 8, 2026. The vtoken-minting and slpx pallets in Bifrost contain an improper authorization vulnerability in channel commission attribution. A signed account can supply an arbitrary registered channel_id when minting tokens without verifying that the caller is authorized to mint on behalf of that channel.…
When was CVE-2026-86840 disclosed?
CVE-2026-86840 was first published in the National Vulnerability Database on September 8, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86840 actively exploited?
CVE-2026-86840 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 84.4% of all scored CVEs.
What is the CVSS score of CVE-2026-86840?
CVE-2026-86840 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-86840?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86840, 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-2026-86840

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