CVE-2026-86840CWE-639CWE-862broken-access-control

CVE-2026-86840

Critical · published September 8, 2026

CVSS v3.1
9.1
EPSS
0%
Percentile
35.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00420 · 35.3th percentile
Weaknesses
CWE-639 · Authorization Bypass Through User-Controlled Key; CWE-862 · Missing Authorization
Published
2026-09-08T20:18Z
References (3)
EPSS history
Timeline
  • 10 SEP 03:18Z
    EPSS moved — → 0%
    epss
  • 08 SEP 15:29Z
    Bifrost Unauthorized Channel Commission Attribution Allows Commission Diversion
    cvelistv5