CVE-2026-9366 MEDIUM

CVE-2026-9366: NousResearch hermes-agent prompt_builder.py _scan_context_content injection

Vendor Nousresearch
Product hermes-agent
Weakness CWE-74
Published May 24, 2026
Last update May 27, 2026

CVSS base score

6.9/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

A vulnerability was found in NousResearch hermes-agent 2026.4.23. The impacted element is the function _scan_context_content of the file agent/prompt_builder.py. The manipulation results in injection. The attack may be performed from remote. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

Key dates

02Disclosure timeline

May 24, 2026 CVE published
May 27, 2026 Record updated