CVE-2026-84289

A vulnerability was found in NousResearch hermes-agent up to 0.18.2. This vulnerability affects the function listtools of the file tools/mcptool.py of the component MCP Tool. Performing a manipulation results in uncontrolled memory allocation. It is possible to initiate the attack remotely. The...

CVE-2026-84288

A vulnerability has been found in NousResearch hermes-agent up to 0.18.2. This affects the function HermesACPAgent.prompt of the file acpadapter/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...

CVE-2026-84289

A vulnerability in NousResearch hermes-agent up to version 0.18.2 affects the list_tools function in tools/mcp_tool.py (MCP Tool component). The root cause is uncontrolled memory allocation , which can lead to a resource amplification denial-of-service when manipulated remotely. The CVSS 4.0 scor...

CVE-2026-84289 NousResearch hermes-agent MCP Tool mcp_tool.py list_tools memory allocation

A vulnerability was found in NousResearch hermes-agent up to 0.18.2. This vulnerability affects the function listtools of the file tools/mcptool.py of the component MCP Tool. Performing a manipulation results in uncontrolled memory allocation. It is possible to initiate the attack remotely. The...

CVE-2026-84287

A flaw has been found in NousResearch hermes-agent 0.18.0. Affected by this issue is some unknown functionality of the file gateway/platforms/apiserver.py of the component Session Chat Interface. This manipulation causes denial of service. The attack is possible to be carried out remotely. The...

CVE-2026-84288 NousResearch hermes-agent ACP Prompt Workflow session.py HermesACPAgent.prompt denial of service

A vulnerability has been found in NousResearch hermes-agent up to 0.18.2. This affects the function HermesACPAgent.prompt of the file acpadapter/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...

CVE-2026-84288

NousResearch hermes-agent (up to version 0.18.2) contains a denial of service vulnerability in the HermesACPAgent.prompt function located in acp_adapter/session.py (ACP Prompt Workflow component). The attack can be performed remotely with low privileges and no user interaction required. A proof-o...

CVE-2026-84287

A denial-of-service vulnerability exists in NousResearch hermes-agent 0.18.0 , specifically within the Session Chat Interface component in the file gateway/platforms/api_server.py. The flaw allows a remote attacker with low privileges to cause a service disruption. The exploit is reported as publ...

EUVD-2026-69699

A flaw has been found in NousResearch hermes-agent 0.18.0. Affected by this issue is some unknown functionality of the file gateway/platforms/apiserver.py of the component Session Chat Interface. This manipulation causes denial of service. The attack is possible to be carried out remotely. The...

CVE-2026-84287 NousResearch hermes-agent Session Chat api_server.py denial of service

A flaw has been found in NousResearch hermes-agent 0.18.0. Affected by this issue is some unknown functionality of the file gateway/platforms/apiserver.py of the component Session Chat Interface. This manipulation causes denial of service. The attack is possible to be carried out remotely. The...

PT-2026-84514

Name of the Vulnerable Software and Affected Versions hermes-agent version 0.18.0 Description A flaw in the Session Chat Interface component, specifically within the gateway/platforms/api server.py file, allows a remote attacker to cause a denial of service. Recommendations At the moment, there i...

PT-2026-84515

Name of the Vulnerable Software and Affected Versions hermes-agent versions prior to 0.18.3 Description A remote denial of service issue exists within the ACP Prompt Workflow component. The flaw is located in the HermesACPAgent.prompt function within the acp adapter/session.py file, where imprope...

PT-2026-84520

Name of the Vulnerable Software and Affected Versions NousResearch hermes-agent versions prior to 0.18.3 Description A flaw in the MCP Tool component allows for uncontrolled memory allocation. This issue occurs within the list tools function located in the tools/mcp tool.py file and can be...

hermes-agent v2026.8.18

Hermes Agent ☤ Hermes Agent | Hermes Desktop The self-improving AI agent built byNous Research. It's the only agent with a built-in learning loop — it creates skills from experience, improves them during use, nudges itself to persist knowledge, searches its own past conversations, and builds a...

CVE-2026-82020

Hermes Agent 0.16.0 prior to 0.17.0 contains an improper path restriction vulnerability that allows attackers who can influence ingested message content to overwrite the credential store by bypassing sensitive-path guards that excluded the auth.json file. Attackers can craft malicious messages...

CVE-2026-82021

Hermes Agent 0.18.2 prior to 0.19.0 contains a supply chain vulnerability in its bundled MCP catalog that allows a remote attacker to execute arbitrary code by compromising a third-party upstream repository referenced via a mutable branch rather than a pinned commit SHA. An attacker who compromis...

EUVD-2026-67867

Hermes Agent 0.18.2 prior to 0.19.0 contains a supply chain vulnerability in its bundled MCP catalog that allows a remote attacker to execute arbitrary code by compromising a third-party upstream repository referenced via a mutable branch rather than a pinned commit SHA. An attacker who compromis...

CVE-2026-82021 Hermes Agent 0.18.2 < 0.19.0 MCP Catalog Supply Chain RCE via Mutable Branch Reference

Hermes Agent 0.18.2 prior to 0.19.0 contains a supply chain vulnerability in its bundled MCP catalog that allows a remote attacker to execute arbitrary code by compromising a third-party upstream repository referenced via a mutable branch rather than a pinned commit SHA. An attacker who compromis...

CVE-2026-82021 Hermes Agent 0.18.2 < 0.19.0 MCP Catalog Supply Chain RCE via Mutable Branch Reference

Hermes Agent 0.18.2 prior to 0.19.0 contains a supply chain vulnerability in its bundled MCP catalog that allows a remote attacker to execute arbitrary code by compromising a third-party upstream repository referenced via a mutable branch rather than a pinned commit SHA. An attacker who compromis...

CVE-2026-82021

Hermes Agent versions 0.18.2 prior to 0.19.0 contain a supply chain vulnerability in its bundled MCP catalog . A third-party upstream repository is referenced via a mutable branch rather than a pinned commit SHA, meaning an attacker who compromises that upstream repository can propagate malicious...