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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
NousResearch hermes-agent affected
Version Status Constraints
2026.4.0 affected —
2026.4.1 affected —
2026.4.2 affected —
2026.4.3 affected —
2026.4.4 affected —
2026.4.5 affected —
2026.4.6 affected —
2026.4.7 affected —
2026.4.8 affected —
2026.4.9 affected —
2026.4.10 affected —
2026.4.11 affected —
2026.4.12 affected —
2026.4.13 affected —
2026.4.14 affected —
2026.4.15 affected —
2026.4.16 affected —
2026.4.17 affected —
2026.4.18 affected —
2026.4.19 affected —
2026.4.20 affected —
2026.4.21 affected —
2026.4.22 affected —
2026.4.23 affected —

No data.

No data.

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Vendors Products
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Hermes-agent Subscribe

Project Subscriptions

Vendors Products
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Hermes-agent Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://gist.github.com/YLChen-007/82a3539d6358842e69dfaef0a9fcf14a cve-icon
https://vuldb.com/submit/812216 cve-icon
https://vuldb.com/vuln/365316 cve-icon
https://vuldb.com/vuln/365316/cti cve-icon
History

Sun, 24 May 2026 05:00:00 +0000

Type Values Removed Values Added
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.
Title NousResearch hermes-agent Skills Guard Multi-Word Prompt skills_guard.py injection
First Time appeared Nousresearch
Nousresearch hermes-agent
Weaknesses CWE-707
CWE-74
CPEs cpe:2.3:a:nousresearch:hermes-agent:*:*:*:*:*:*:*:*
Vendors & Products Nousresearch
Nousresearch hermes-agent
References
Metrics cvssV2_0

{'score': 7.5, 'vector': 'AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 7.3, 'vector': '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'}

cvssV3_1

{'score': 7.3, 'vector': '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'}

cvssV4_0

{'score': 6.9, 'vector': '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-05-24T03:45:07.511Z

Reserved: 2026-05-23T09:19:38.292Z

Link: CVE-2026-9353

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-24T06:30:05Z

Weaknesses