Vulnerability in Nousresearch Hermes-Agent
CVE-2026-84287
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.005 (42.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001
Affected products
- Nousresearch Hermes-Agent — versions 0.18.0
Weakness classification (CWE)
References
- github.com/hackerguopeng/cve/tree/main/Hermes_API_Server_Session_Chat_DoS_Report (exploit)
- vuldb.com/cve/CVE-2026-84287 (third-party-advisory)
- vuldb.com/submit/882712 (third-party-advisory)
- vuldb.com/submit/882795 (third-party-advisory)
- vuldb.com/vuln/397718 (vdb-entry)
- vuldb.com/vuln/397718/cti (signature, permissions-required)
Frequently asked questions
- What is CVE-2026-84287?
- CVE-2026-84287 is a medium-severity vulnerability in Nousresearch Hermes-Agent, classified under Improper Resource Shutdown or Release. CVSS score: 4.3/10. Published 2026-09-01.
- How severe is CVE-2026-84287?
- Medium severity. CVSS v3 base score is 4.3 out of 10.