NousResearch hermes-agent 0.18.0 Session Management s71.py _sess_nowait session_id authorization

Summaryinfo

A vulnerability described as critical has been identified in NousResearch hermes-agent 0.18.0. This affects the function _sess_nowait of the file s71.py of the component Session Management. Such manipulation of the argument session_id leads to authorization. This vulnerability is uniquely identified as CVE-2026-85105. The attack can be launched remotely. No exploit exists. The vendor was contacted early about this disclosure but did not respond in any way.

Detailsinfo

A vulnerability was found in NousResearch hermes-agent 0.18.0. It has been rated as critical. Affected by this issue is the function _sess_nowait of the file s71.py of the component Session Management. The manipulation of the argument session_id with an unknown input leads to a authorization vulnerability. Using CWE to declare the problem leads to CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. Impacted is confidentiality, integrity, and availability.

This vulnerability is handled as CVE-2026-85105. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/03/2026).

The vendor was contacted early about this disclosure but did not respond in any way.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• NousResearch

Name

• hermes-agent

Version

• 0.18.0

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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Accepted

• Submit #885131: NousResearch hermes-agent 0.18.0 Authorization Bypass Through User-Controlled Key (by KendrickZou)

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