# CVE-2026-6832: Nesquena Hermes WebUI Arbitrary File Deletion via Unvalidated session_id

> Authenticated attackers can delete arbitrary JSON files on the host system via path traversal in the session_id parameter of the Hermes WebUI.

- **Severity:** High 7.2 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Apr 2026
- **Updated:** 14 Jul 2026
- **Also known as:** GHSA-pwfc-qm9r-p6h4

## What is CVE-2026-6832?

CVE-2026-6832 is a high-severity path traversal vulnerability in nesquena hermes-webui, published on 21 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Hermes WebUI contains an arbitrary file deletion vulnerability in the /api/session/delete endpoint that allows authenticated attackers to delete files outside the session directory by supplying an absolute path or path traversal payload in the session_id parameter. Attackers can exploit unvalidated session identifiers to construct paths that bypass the SESSION_DIR boundary and delete writable JSON files on the host system.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2026-6832?

It affects 1 product.


Products: Get-Hermes Hermes Web Ui.

## How do I fix CVE-2026-6832?

No fix has been published for CVE-2026-6832 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-6832 being exploited?

There is no known exploitation of CVE-2026-6832 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-6832 and fix it if it is affected.

What it is: CVE-2026-6832 is a high-severity path traversal vulnerability in nesquena hermes-webui, published on 21 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-6832 in the wild and no public exploit code.

Affected product: nesquena hermes-webui. 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-2026-6832/ (Markdown: https://insights.sbomify.com/CVE-2026-6832/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-6832
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-6832
- OSV: https://osv.dev/vulnerability/CVE-2026-6832

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-6832/
Summaries are generated and may contain mistakes; the official description above is the record.