CVE-2026-84287

MEDIUM 4.3

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

CVSS Score

4.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-404
Vendor	nousresearch
Product	hermes-agent
Published	Sep 1, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

NousResearch / hermes-agent

0.18.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/397718 vuldb.com: https://vuldb.com/vuln/397718/cti vuldb.com: https://vuldb.com/cve/CVE-2026-84287 vuldb.com: https://vuldb.com/submit/882712 vuldb.com: https://vuldb.com/submit/882795 github.com: https://github.com/hackerguopeng/cve/tree/main/Hermes_API_Server_Session_Chat_DoS_Report

Credits

🔍 hackerguopeng (VulDB User) VulDB CNA Team