CVE-2026-10223Public exploitNetwork attack vector

Authenticated persistent memory injection

Published Jun 1, 2026 · Updated Jun 1, 2026

Injection in _scan_memory_content in Nous Research Hermes Agent 2026.4.0 through 2026.4.30 allows remote authenticated users to alter memory. The scanner in tools/memory_tool.py accepts content that the memory store later persists and renders into the system prompt, but the publisher does not disclose the exact input pattern or failed neutralization operation. Network access with low privileges is required; the injected content can persist across sessions, while no specific command-execution or data-disclosure consequence is documented.

CVSS severity6.3
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Injection in _scan_memory_content in Nous Research Hermes Agent 2026.4.0 through 2026.4.30 allows remote authenticated users to alter memory. The scanner in tools/memory_tool.py accepts content that the memory store later persists and renders into the system prompt, but the publisher does not disclose the exact input pattern or failed neutralization operation. Network access with low privileges is required; the injected content can persist across sessions, while no specific command-execution or data-disclosure consequence is documented.

The record

CVE
CVE-2026-10223
Published
Jun 1, 2026
Updated
Jun 1, 2026
Vendor
Nous Research
Product
Hermes Agent
Classifications
CWE-707, CWE-74, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

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

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

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

6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E: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.

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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-707Improper Neutralization
CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1565.001Stored Data Manipulation

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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