# CVE-2026-85105: NousResearch hermes-agent Session Management s71.py _sess_nowait authorization

> Remote attackers can bypass authorization in NousResearch hermes-agent by manipulating the session_id argument in the session management module.

- **Severity:** Medium 6.9 (`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:X`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 Sep 2026
- **Updated:** 3 Sep 2026
- **Also known as:** GHSA-47g2-35xp-x46h

## What is CVE-2026-85105?

CVE-2026-85105 is a medium-severity authentication bypass vulnerability in NousResearch hermes-agent, published on 3 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A flaw has been found in NousResearch hermes-agent 0.18.0. Affected by this issue is the function _sess_nowait of the file s71.py of the component Session Management. This manipulation of the argument session_id causes authorization bypass. The attack can be initiated remotely. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key), CWE-285 (Improper Authorization)

## Which versions are affected by CVE-2026-85105?


## How do I fix CVE-2026-85105?

No fix has been published for CVE-2026-85105 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-85105 being exploited?

There is no known exploitation of CVE-2026-85105 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-85105 and fix it if it is affected.

What it is: CVE-2026-85105 is a medium-severity authentication bypass vulnerability in NousResearch hermes-agent, published on 3 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-85105 in the wild and no public exploit code.

Affected product: NousResearch hermes-agent. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-85105/ (Markdown: https://insights.sbomify.com/CVE-2026-85105/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-85105
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-85105
- OSV: https://osv.dev/vulnerability/CVE-2026-85105

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-85105/
Summaries are generated and may contain mistakes; the official description above is the record.