CVE-2026-9352Public exploitNetwork attack vector

Remote secret disclosure via inherited subprocess environment

Published May 24, 2026 · Updated May 24, 2026

Information disclosure in Hermes Agent 2026.4.0 through 2026.4.23 allows remote attackers to read gateway secrets via messaging commands. _make_run_env in tools/environments/local.py merges the gateway's entire process environment into tool subprocesses and filters only recognized provider keys, leaving other credentials exposed. An attacker must reach an enabled messaging gateway and trigger local-backend tool execution; the consequence is read-only disclosure of inherited environment values.

CVSS severity5.3
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Hermes Agent 2026.4.0 through 2026.4.23 allows remote attackers to read gateway secrets via messaging commands. _make_run_env in tools/environments/local.py merges the gateway's entire process environment into tool subprocesses and filters only recognized provider keys, leaving other credentials exposed. An attacker must reach an enabled messaging gateway and trigger local-backend tool execution; the consequence is read-only disclosure of inherited environment values.

The record

CVE
CVE-2026-9352
Published
May 24, 2026
Updated
May 24, 2026
Vendor
Nous Research
Product
Hermes Agent
Classifications
CWE-284, CWE-200, T1190
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=2026.4.17
  11. Affected versionversion=2026.4.18
  12. Affected versionversion=2026.4.19
  13. Affected versionversion=2026.4.2
  14. Affected versionversion=2026.4.20
  15. Affected versionversion=2026.4.21
  16. Affected versionversion=2026.4.22
  17. Affected versionversion=2026.4.23
  18. Affected versionversion=2026.4.3
  19. Affected versionversion=2026.4.4
  20. Affected versionversion=2026.4.5
  21. Affected versionversion=2026.4.6
  22. Affected versionversion=2026.4.7
  23. Affected versionversion=2026.4.8
  24. 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=2026.4.17; version=2026.4.18; version=2026.4.19; version=2026.4.2; version=2026.4.20; version=2026.4.21; version=2026.4.22; version=2026.4.23; 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

5.0VulDBAV:N/AC:L/Au:N/C:P/I:N/A:N
5.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.5VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
6.9VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control
CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1190Exploit Public-Facing Application

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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