CVE-2026-114463: CVE-2026-114463

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-21 · updated 2026-10-30
Weakness: CWE-863

Description

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 products

Nous Research Hermes Agent: through 2026.8.19

References

https://github.com/NousResearch/hermes-agent/pull/115285
https://github.com/NousResearch/hermes-agent/releases/tag/v0.22.2
https://github.com/pinarsadioglu/security-advisories/blob/main/webhook-route-authz-bypass.md
https://github.com/pinarsadioglu/security-advisories/blob/main/webhook-route-authz-bypass.md

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