EUVD-2026-31580
GHSA-pgp4-xr4j-h5cg
CVSS VectorNVD
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3DescriptionNVD
A vulnerability was found in NousResearch hermes-agent 2026.4.23. The impacted element is the function _scan_context_content of the file agent/prompt_builder.py. The manipulation results in injection. The attack may be performed from remote. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.
AnalysisAI
Code injection in NousResearch hermes-agent 2026.4.23 allows remote unauthenticated attackers to inject and execute arbitrary code through the _scan_context_content function in agent/prompt_builder.py. The vulnerability has publicly available exploit code and affects all versions up to 2026.4.23, with the vendor failing to respond to disclosure attempts.
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RemediationAI
Within 24 hours: Identify all systems running NousResearch hermes-agent up to version 2026.4.23 and isolate affected instances from untrusted networks. Within 7 days: Engage NousResearch for patch timeline confirmation; if no vendor patch is forthcoming, evaluate alternative agent libraries or implement network segmentation to restrict access to hermes-agent endpoints to trusted sources only. …
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External POC / Exploit Code
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