CVE-2026-9353
NousResearch hermes-agent Skills Guard Multi-Word Prompt skills_guard.py injection
- State
- Published
- Severity
- 6.9 Medium
- Published
- May 24, 2026
- Updated
- May 26, 2026
- Reserved
- May 23, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 7.3 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R | VulDB |
| 3.0 | 7.3 High | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R | VulDB |
| 2.0 | 7.5 High | AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
hermes-agentNousResearch |
|
References
- VDB-365316 | NousResearch hermes-agent Skills Guard Multi-Word Prompt skills_guard.py injectionvdb-entrytechnical-description
- VDB-365316 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
- Submit #812216 | NousResearch hermes-agent 2026.4.23 Injection (CWE-74)third-party-advisory
- https://gist.github.com/YLChen-007/82a3539d6358842e69dfaef0a9fcf14aexploit
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