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Description

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.

PUBLISHED Reserved 2026-05-23 | Published 2026-05-24 | Updated 2026-05-27 | Assigner VulDB




MEDIUM: 6.9CVSS: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
HIGH: 7.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
HIGH: 7.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
7.5AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR

Problem types

Injection

Improper Neutralization

Product status

2026.4.23
affected

Timeline

2026-05-23:Advisory disclosed
2026-05-23:VulDB entry created
2026-05-23:VulDB entry last update

Credits

Eric-i (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/365329 (VDB-365329 | NousResearch hermes-agent prompt_builder.py _scan_context_content injection) vdb-entry technical-description

vuldb.com/vuln/365329/cti (VDB-365329 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/submit/812227 (Submit #812227 | NousResearch hermes-agent 2026.4.23 Injection (CWE-74)) third-party-advisory

gist.github.com/YLChen-007/581fd92de5548fbaacb2092e848a75cc exploit

cve.org (CVE-2026-9366)

nvd.nist.gov (CVE-2026-9366)

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