CVE-2026-84287

NousResearch hermes-agent Session Chat api_server.py denial of service

MEDIUM
4.3
CVSS Score
Published: September 1, 2026 at 09:00 PM UTC
Updated: September 4, 2026 at 03:17 AM UTC
1 product affected across 1 vendorHermes Agent

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.5%
SSVC
PoC

Description

A flaw has been found in NousResearch hermes-agent 0.18.0. Affected by this issue is some unknown functionality of the file gateway/platforms/api_server.py of the component Session Chat Interface. This manipulation causes denial of service. The attack is possible to be carried out remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (6)

VDB Entry
Source: cverecord
https://vuldb.com/vuln/397718
SignaturePermissions Required
Source: cverecord
https://vuldb.com/vuln/397718/cti
Third Party Advisory
Source: cverecord
https://vuldb.com/cve/CVE-2026-84287
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/882712
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/882795

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.3MEDIUMVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-404

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