Authorization Flaw in NousResearch Hermes-Agent Quick Command Handler
CVE-2026-18773

5.3MEDIUM

Key Information:

Vendor

Nousresearch

Status
Hermes-agent
Vendor
CVE Published:
4 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-18773?

A vulnerability exists in NousResearch's hermes-agent affecting versions up to 2026.6.5, particularly in the _check_slash_access function of the gateway/run.py file within the Quick Command Handler component. This flaw allows unauthorized access, enabling attackers to manipulate the system remotely. The vulnerability has been publicly disclosed, and despite prior notification to NousResearch, there has been no response regarding the issue.

Affected Version(s)

hermes-agent 2026.6.0

hermes-agent 2026.6.1

hermes-agent 2026.6.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-18773 - Proof of Concept

References

https://vuldb.com/vuln/385783
vdb-entrytechnical-description
https://vuldb.com/vuln/385783/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-18773
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Eric-y (VulDB User)
VulDB CNA Team
.