CVE-2026-84288: medium-severity vulnerability in NousResearch hermes-agent
NousResearch hermes-agent ACP Prompt Workflow session.py HermesACPAgent.prompt denial of service
Published · Updated
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33Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 5.3epss 0.5%
A vulnerability has been found in NousResearch hermes-agent up to 0.18.2. This affects the function HermesACPAgent.prompt of the file acp_adapter/session.py of the component ACP Prompt Workflow. Such manipulation leads to denial of service. The attack may be performed from remote. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
Affected products
NousResearch · hermes-agentpublic PoCs found — 1
cve_referencegithub.com/hackerguopeng/cve/tree/main/Hermes_ACP_Queued_Prompt_DoS_Reportunverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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