Privilege Assignment Vulnerability in NousResearch Hermes-Agent Software
CVE-2026-18976

5.3MEDIUM

Key Information:

Vendor

Nousresearch

Status
Hermes-agent
Vendor
CVE Published:
6 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-18976?

A vulnerability has been identified in the NousResearch Hermes-Agent up to version 0.16.0, specifically within the disabled_toolsets Handler. This issue arises from improper handling in the get_tool_definitions function of the agent_init.py file, leading to incorrect privilege assignments. Because this vulnerability allows for potential remote exploitation, it poses a significant security risk. The issue was reported to the project maintainers early on, and since then, details have become publicly available. Users are encouraged to update to patched versions to mitigate risks associated with this vulnerability.

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-2026-18976 - Proof of Concept

References

https://vuldb.com/vuln/386264
vdb-entrytechnical-description
https://vuldb.com/vuln/386264/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-18976
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

Erichen-apple (VulDB User)
VulDB CNA Team
.