CVE-2026-18773Public exploitNetwork attack vector

Authenticated command execution via ungated quick commands

Published Aug 4, 2026 · Updated Aug 4, 2026

Incorrect authorization in Nous Research Hermes Agent 2026.6.0 through 2026.6.5 allows remote authenticated users to execute quick commands. In gateway/run.py, dispatch gates only registered slash commands with _check_slash_access, then runs matching unregistered type: exec quick commands through a shell without repeating the authorization check. Exploitation requires an allowed messaging-platform user, an enabled allow_admin_from policy, and a configured executable quick command; it grants the command's output and effects.

CVSS severityUnavailable
Unscored
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Incorrect authorization in Nous Research Hermes Agent 2026.6.0 through 2026.6.5 allows remote authenticated users to execute quick commands. In gateway/run.py, dispatch gates only registered slash commands with _check_slash_access, then runs matching unregistered type: exec quick commands through a shell without repeating the authorization check. Exploitation requires an allowed messaging-platform user, an enabled allow_admin_from policy, and a configured executable quick command; it grants the command's output and effects.

The record

CVE
CVE-2026-18773
Published
Aug 4, 2026
Updated
Aug 4, 2026
Vendor
Nous Research
Product
Hermes Agent
Classifications
CWE-285, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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=2026.6.0
  2. Affected versionversion=2026.6.1
  3. Affected versionversion=2026.6.2
  4. Affected versionversion=2026.6.3
  5. Affected versionversion=2026.6.4
  6. Affected versionversion=2026.6.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Nous Research · Hermes Agentversion=2026.6.0; version=2026.6.1; version=2026.6.2; version=2026.6.3; version=2026.6.4; version=2026.6.5

Published CVSS scores

No CVSS assessment is available in this record.

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-285Improper Authorization
T1059Command and Scripting Interpreter

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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