Remote Code Injection in NousResearch Hermes-Agent 2026.4.23
CVE-2026-9366

6.9MEDIUM

Key Information:

Vendor

Nousresearch

Status
Hermes-agent
Vendor
CVE Published:
24 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-9366?

A code injection vulnerability was identified in NousResearch hermes-agent version 2026.4.23, where the function _scan_context_content in the file agent/prompt_builder.py is susceptible to manipulation. This could potentially allow an attacker to execute arbitrary commands remotely. The vulnerability has been publicly disclosed, and despite early contact with the vendor regarding the issue, there has been no response. Users of the affected product should take immediate action to mitigate risks associated with this vulnerability.

Affected Version(s)

hermes-agent 2026.4.23

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-2026-9366 - Proof of Concept

References

https://vuldb.com/vuln/365329
vdb-entrytechnical-description
https://vuldb.com/vuln/365329/cti
signaturepermissions-required
https://vuldb.com/submit/812227
third-party-advisory

CVSS V4

Score:
6.9
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-i (VulDB User)
VulDB CNA Team
.