Improper Access Controls in NousResearch hermes-agent Memory Toolset
CVE-2026-18993

5.3MEDIUM

Key Information:

Vendor

Nousresearch

Status
Hermes-agent
Vendor
CVE Published:
6 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-18993?

A vulnerability has been identified in the NousResearch hermes-agent Memory Toolset, specifically within the model_tools.py file. This flaw allows improper access controls, enabling potential unauthorized access to sensitive functionalities. The vulnerability can be exploited remotely, raising concerns for users. As the exploit details are now publicly available, it is critical for organizations using this product to patch their systems promptly to mitigate potential risks.

Affected Version(s)

hermes-agent 0.1

hermes-agent 0.2

hermes-agent 0.3

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-2026-18993 - Proof of Concept

References

https://vuldb.com/vuln/386377
vdb-entry
https://vuldb.com/vuln/386377/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-18993
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

ChenMarry (VulDB User)
.