CVE-2026-84288CWE-404

CVE-2026-84288

Medium · published September 2, 2026

CVSS v3.1
4.3
EPSS
0%
Percentile
39.7
In the wild
Unconfirmed
What it is

A vulnerability has been found in NousResearch hermes-agent up to 0.18.2. This affects the function HermesACPAgent.prompt of the file acp_adapter/session.py of the component ACP Prompt Workflow. Such manipulation leads to denial of service. The attack may be performed from remote. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CVSS v4.0
5.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
EPSS
0.00471 · 39.7th percentile
Weakness
CWE-404 · Improper Resource Shutdown or Release
Published
2026-09-02T02:17Z
References (5)
https://github.com/hackerguopeng/cve/tree/main/Hermes_ACP_Queued_Prompt_DoS_Report · [email protected]https://vuldb.com/cve/CVE-2026-84288 · [email protected]https://vuldb.com/submit/882873 · [email protected]https://vuldb.com/vuln/397719 · [email protected]https://vuldb.com/vuln/397719/cti · [email protected]
EPSS history
Timeline
  • 03 SEP 03:32Z
    EPSS moved — → 0%
    epss
  • 01 SEP 21:15Z
    NousResearch hermes-agent ACP Prompt Workflow session.py HermesACPAgent.prompt denial of service
    cvelistv5