CVE-2026-9368Public exploitNetwork attack vector

Unauthenticated host code execution via unguarded execute_code

Published May 24, 2026 · Updated May 24, 2026

Sandbox bypass in Hermes Agent 2026.4.0 through 2026.4.16 allows remote attackers to execute host code through execute_code. The tool writes LLM-generated Python to script.py and launches it with subprocess.Popen without applying the terminal approval guard. An enabled execute_code tool and attacker-controlled content that induces its use are required; execution runs with the agent process's host privileges.

CVSS severity6.9
Medium
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sandbox bypass in Hermes Agent 2026.4.0 through 2026.4.16 allows remote attackers to execute host code through execute_code. The tool writes LLM-generated Python to script.py and launches it with subprocess.Popen without applying the terminal approval guard. An enabled execute_code tool and attacker-controlled content that induces its use are required; execution runs with the agent process's host privileges.

The record

CVE
CVE-2026-9368
Published
May 24, 2026
Updated
May 24, 2026
Vendor
Nous Research
Product
Hermes Agent
Classifications
CWE-265, CWE-264, T1059.006
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 24, 2026CVE publishedPublication date reported by the CVE source.
  2. May 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2026.4.0
  2. Affected versionversion=2026.4.1
  3. Affected versionversion=2026.4.10
  4. Affected versionversion=2026.4.11
  5. Affected versionversion=2026.4.12
  6. Affected versionversion=2026.4.13
  7. Affected versionversion=2026.4.14
  8. Affected versionversion=2026.4.15
  9. Affected versionversion=2026.4.16
  10. Affected versionversion=2026.4.2
  11. Affected versionversion=2026.4.3
  12. Affected versionversion=2026.4.4
  13. Affected versionversion=2026.4.5
  14. Affected versionversion=2026.4.6
  15. Affected versionversion=2026.4.7
  16. Affected versionversion=2026.4.8
  17. Affected versionversion=2026.4.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Nous Research · Hermes Agentversion=2026.4.0; version=2026.4.1; version=2026.4.10; version=2026.4.11; version=2026.4.12; version=2026.4.13; version=2026.4.14; version=2026.4.15; version=2026.4.16; version=2026.4.2; version=2026.4.3; version=2026.4.4; version=2026.4.5; version=2026.4.6; version=2026.4.7; version=2026.4.8; version=2026.4.9

Published CVSS scores

6.9VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
7.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
5.5VulDBCVSS: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
7.5VulDBAV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-265Privilege Issues
CWE-264Permissions, Privileges, and Access Controls
T1059.006Command and Scripting Interpreter: Python

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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