CVE-2026-86840 Bifrost Unauthorized Channel Commission Attribution Allows Commission Diversion
Attackers can divert protocol commissions by minting tokens under unauthorized channel IDs, affecting Bifrost blockchain users and operators.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-86840?
CVE-2026-86840 is a critical missing authorization vulnerability in Bitfrost.io Bifrost, published on 8 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Which versions are affected by CVE-2026-86840?
How do I fix CVE-2026-86840?
No fix has been published for CVE-2026-86840 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-86840 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-86840 exists.
Sources
Also known as GHSA-wm9v-x9j6-gf6x.