CVE-2026-9353

HIGH 7.3

NousResearch hermes-agent Skills Guard Multi-Word Prompt skills_guard.py injection

CVSS Score

7.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-74 CWE-707
Vendor	nousresearch
Product	hermes-agent
Published	May 24, 2026
Last Updated	May 26, 2026

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CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

NousResearch / hermes-agent

2026.4.0 2026.4.1 2026.4.2 2026.4.3 2026.4.4 2026.4.5 2026.4.6 2026.4.7 2026.4.8 2026.4.9 2026.4.10 2026.4.11 2026.4.12 2026.4.13 2026.4.14 2026.4.15 2026.4.16 2026.4.17 2026.4.18 2026.4.19 2026.4.20 2026.4.21 2026.4.22 2026.4.23

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/365316 vuldb.com: https://vuldb.com/vuln/365316/cti vuldb.com: https://vuldb.com/submit/812216 gist.github.com: https://gist.github.com/YLChen-007/82a3539d6358842e69dfaef0a9fcf14a

Credits

🔍 Eric-i (VulDB User) VulDB CNA Team