Denial of Service Vulnerability in NousResearch Hermes-agent 0.18.0
CVE-2026-84287

5.3MEDIUM

Key Information:

Vendor

Nousresearch

Status
Hermes-agent
Vendor
CVE Published:
1 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-84287?

A vulnerability has been identified in NousResearch hermes-agent version 0.18.0, specifically within the Session Chat Interface component, located in the file gateway/platforms/api_server.py. This issue allows an attacker to exploit the service remotely, resulting in a denial of service. Despite early notification to the vendor regarding this flaw, no response has been received. Given the potential for exploitation, it is crucial for users of this product to take appropriate precautions.

Affected Version(s)

hermes-agent 0.18.0

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-2026-84287 - Proof of Concept

References

https://vuldb.com/vuln/397718
vdb-entry
https://vuldb.com/vuln/397718/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-84287
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
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

hackerguopeng (VulDB User)
VulDB CNA Team
.