MEDIUM
NousResearch hermes-agent Skills Guard Multi-Word Prompt skills_guard.py injection
Published May 24, 2026
6.9
MEDIUMCVSS 4.0
EPSS 0.52%
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.
Affected products
-
- Version 2026.4.0StatusaffectedConstraints-
- Version 2026.4.1StatusaffectedConstraints-
- Version 2026.4.10StatusaffectedConstraints-
- Version 2026.4.11StatusaffectedConstraints-
- Version 2026.4.12StatusaffectedConstraints-
- Version 2026.4.13StatusaffectedConstraints-
- Version 2026.4.14StatusaffectedConstraints-
- Version 2026.4.15StatusaffectedConstraints-
- Version 2026.4.16StatusaffectedConstraints-
- Version 2026.4.17StatusaffectedConstraints-
- Version 2026.4.18StatusaffectedConstraints-
- Version 2026.4.19StatusaffectedConstraints-
- Version 2026.4.2StatusaffectedConstraints-
- Version 2026.4.20StatusaffectedConstraints-
- Version 2026.4.21StatusaffectedConstraints-
- Version 2026.4.22StatusaffectedConstraints-
- Version 2026.4.23StatusaffectedConstraints-
- Version 2026.4.3StatusaffectedConstraints-
- Version 2026.4.4StatusaffectedConstraints-
- Version 2026.4.5StatusaffectedConstraints-
- Version 2026.4.6StatusaffectedConstraints-
- Version 2026.4.7StatusaffectedConstraints-
- Version 2026.4.8StatusaffectedConstraints-
- Version 2026.4.9StatusaffectedConstraints-
- Version
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 | n/a |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
References (9)
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-31567 Advisory
- https://gist.github.com/YLChen-007/82a3539d6358842e69dfaef0a9fcf14a exploit
- https://github.com/NousResearch/hermes-agent/commit/7ebebfbb8d10937cbf2219b4cf5e121b71e67428
- https://github.com/NousResearch/hermes-agent/pull/26852
- https://github.com/advisories/GHSA-238w-f66p-w349 Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-9353
- https://vuldb.com/submit/812216 third-party-advisory
- https://vuldb.com/vuln/365316 vdb-entrytechnical-description
- https://vuldb.com/vuln/365316/cti signaturepermissions-required
| Link | Providers | Tags |
|---|---|---|
| https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-31567 | Advisory | |
| https://gist.github.com/YLChen-007/82a3539d6358842e69dfaef0a9fcf14a | exploit | |
| https://github.com/NousResearch/hermes-agent/commit/7ebebfbb8d10937cbf2219b4cf5e121b71e67428 | ||
| https://github.com/NousResearch/hermes-agent/pull/26852 | ||
| https://github.com/advisories/GHSA-238w-f66p-w349 | Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2026-9353 | ||
| https://vuldb.com/submit/812216 | third-party-advisory | |
| https://vuldb.com/vuln/365316 | vdb-entrytechnical-description | |
| https://vuldb.com/vuln/365316/cti | signaturepermissions-required |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner VulDB
Published May 24, 2026
Updated May 26, 2026
Reserved May 23, 2026
Link CVE-2026-9353
CISA Vulnrichment
Updated May 26, 2026
ENISA EUVD
EUVD-2026-31567 GHSA-238W-F66P-W349 Assigner VulDB
Published May 24, 2026
Updated May 26, 2026
Exploited since n/a
Link EUVD-2026-31567