CVE-2026-9353

Summary

A security vulnerability has been detected in NousResearch hermes-agent up to 2026.4.23. Impacted is an unknown function of the file agent/skills_guard.py of the component Skills Guard Multi-Word Prompt Handler. The manipulation of the argument THREAT_PATTERNS leads to injection. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Affected Software

VendorProductVersion RangeStatus
NousResearchhermes-agent2026.4.0affected
NousResearchhermes-agent2026.4.1affected
NousResearchhermes-agent2026.4.2affected
NousResearchhermes-agent2026.4.3affected
NousResearchhermes-agent2026.4.4affected
NousResearchhermes-agent2026.4.5affected
NousResearchhermes-agent2026.4.6affected
NousResearchhermes-agent2026.4.7affected
NousResearchhermes-agent2026.4.8affected
NousResearchhermes-agent2026.4.9affected
NousResearchhermes-agent2026.4.10affected
NousResearchhermes-agent2026.4.11affected
NousResearchhermes-agent2026.4.12affected
NousResearchhermes-agent2026.4.13affected
NousResearchhermes-agent2026.4.14affected
NousResearchhermes-agent2026.4.15affected
NousResearchhermes-agent2026.4.16affected
NousResearchhermes-agent2026.4.17affected
NousResearchhermes-agent2026.4.18affected
NousResearchhermes-agent2026.4.19affected
NousResearchhermes-agent2026.4.20affected
NousResearchhermes-agent2026.4.21affected
NousResearchhermes-agent2026.4.22affected
NousResearchhermes-agent2026.4.23affected

Weaknesses

  • CWE-74: Injection
  • CWE-707: Improper Neutralization

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: poc
    • Automatable: yes
    • Technical Impact: partial

References