Description (CNA)
The webhook platform gateway in Nous Research Hermes Agent versions builds the session chat_id as webhook:{route_name}:{delivery_id} and re-derives the authorizing route by splitting that string, so a route name containing a ":" resolves toolset authorization to a different, higher-privileged prefix route than the one authenticated, which allows a remote attacker with the target HMAC to gain that higher-privileged route's toolsets.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Nous Research / Hermes Agent | affected 0 through 2026.8.19 |
CWE
No CWE identifiers supplied.