CVE-2026-10222Public exploitNetwork attack vector

Configuration corruption via embedded environment variable key

Published Jun 1, 2026 · Updated Jun 1, 2026

Injection in Nous Research Hermes Agent before 0.18.0 allows remote attackers to corrupt environment configuration through crafted variable values. _sanitize_env_lines in hermes_cli/config.py mistakes a known environment-variable name followed by '=' inside a value for a new entry, then splits and rewrites the .env file. Exploitation requires control of a configuration value containing that token pattern; successful input truncates the original value and creates a fabricated variable entry.

CVSS severity5.6
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Injection in Nous Research Hermes Agent before 0.18.0 allows remote attackers to corrupt environment configuration through crafted variable values. _sanitize_env_lines in hermes_cli/config.py mistakes a known environment-variable name followed by '=' inside a value for a new entry, then splits and rewrites the .env file. Exploitation requires control of a configuration value containing that token pattern; successful input truncates the original value and creates a fabricated variable entry.

The record

CVE
CVE-2026-10222
Published
Jun 1, 2026
Updated
Jun 1, 2026
Vendor
Nous Research
Product
Hermes Agent
Classifications
CWE-74, CWE-707
Attack vector
network
Privileges
unauthenticated

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

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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 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=2026.4.24; 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

5.1VulDBAV:N/AC:H/Au:N/C:P/I:P/A:P
2.9VulDBCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
5.6VulDBCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-707Improper Neutralization

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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