Path Traversal Vulnerability in NousResearch Hermes-Agent
CVE-2026-9351

6.9MEDIUM

Key Information:

Vendor

Nousresearch

Status
Hermes-agent
Vendor
CVE Published:
24 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-9351?

A security flaw has been identified in NousResearch's hermes-agent, specifically within the read_file Tool's _is_blocked_device function in the file tools/file_tools.py. This vulnerability allows for path traversal, which can be exploited remotely. Details indicate that a proper manipulation of file paths could potentially expose system files or sensitive information. The exploit has already been made public, raising concerns regarding its vulnerability to malicious attacks. Despite early notifications, the vendor has not provided any responses regarding this disclosure.

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-2026-9351 - Proof of Concept

References

https://vuldb.com/vuln/365314
vdb-entrytechnical-description
https://vuldb.com/vuln/365314/cti
signaturepermissions-required
https://vuldb.com/submit/812214
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
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-h (VulDB User)
VulDB CNA Team
.