Vulnerability · Published Sep 8, 2026 · Assigned by certcc
CVE-2026-86840Bifrost Unauthorized Channel Commission Attribution Allows Commission Diversion
Critical 9.1
In plain English
A critical-severity missing authorization in Bifrost from Bitfrost.io. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Bitfrost.io | Bifrost | 0 – through 2022.02 |
Weakness: CWE-862, CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N