CVE-2026-14617Public exploitNetwork attack vector

Reasoning disclosure via case-sensitive streaming tag filter

Published Jul 3, 2026 · Updated Jul 3, 2026

Information disclosure in Hermes Agent 2026.4.0 through 2026.4.30 allows remote authenticated users to view transient reasoning text. The gateway stream consumer uses case-sensitive literal matching for inline reasoning tags, so mixed-case tags bypass its live filter. The leak is limited to intermediate streaming frames; the final delivered message passes through a case-insensitive scrub and does not retain the text.

CVSS severity3.1
Low
EPSS probability0.37%
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 2026.4.30 allows remote authenticated users to view transient reasoning text. The gateway stream consumer uses case-sensitive literal matching for inline reasoning tags, so mixed-case tags bypass its live filter. The leak is limited to intermediate streaming frames; the final delivered message passes through a case-insensitive scrub and does not retain the text.

The record

CVE
CVE-2026-14617
Published
Jul 3, 2026
Updated
Jul 3, 2026
Vendor
Nous Research
Product
Hermes Agent
Classifications
CWE-697, CWE-178
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 3, 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=2026.4.24
  19. Affected versionversion=2026.4.25
  20. Affected versionversion=2026.4.26
  21. Affected versionversion=2026.4.27
  22. Affected versionversion=2026.4.28
  23. Affected versionversion=2026.4.29
  24. Affected versionversion=2026.4.3
  25. Affected versionversion=2026.4.30
  26. Affected versionversion=2026.4.4
  27. Affected versionversion=2026.4.5
  28. Affected versionversion=2026.4.6
  29. Affected versionversion=2026.4.7
  30. Affected versionversion=2026.4.8
  31. Affected versionversion=2026.4.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

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=2026.4.24; version=2026.4.25; version=2026.4.26; version=2026.4.27; version=2026.4.28; version=2026.4.29; version=2026.4.3; version=2026.4.30; 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

1.3VulDBCVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
2.1VulDBAV:N/AC:H/Au:S/C:P/I:N/A:N
3.1VulDBCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-697Incorrect Comparison
CWE-178Improper Handling of Case Sensitivity

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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