Injection Vulnerability in NousResearch Hermes-Agent Plugin
CVE-2026-10220

6.9MEDIUM

Key Information:

Vendor

Nousresearch

Status
Hermes-agent
Vendor
CVE Published:
1 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-10220?

The NousResearch hermes-agent plugin, specifically the _serve_plugin_skill/skill_view function within tools/skills_tool.py, is susceptible to an injection vulnerability. This flaw allows attackers to manipulate input, potentially leading to remote code execution. Despite early notification to the vendor about this serious issue, there has been no response or remediation. The vulnerability has been publicly disclosed, increasing its risk as it may be exploited by malicious actors.

Affected Version(s)

hermes-agent 2026.4.0

hermes-agent 2026.4.1

hermes-agent 2026.4.2

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-2026-10220 - Proof of Concept

References

https://vuldb.com/vuln/367499
vdb-entrytechnical-description
https://vuldb.com/vuln/367499/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-10220
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-j (VulDB User)
VulDB CNA Team
.