---
id: CVE-2026-6832
title: Nesquena Hermes WebUI Arbitrary File Deletion via Unvalidated session_id
summary: >-
  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 …
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-22
vendor: nesquena
product: hermes-webui
affected:
  - 'hermes-webui < PR #409'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-04-22T17:53:35.836162Z'
published: '2026-04-21'
updated: '2026-11-08'
sourceUpdated: '2026-11-08T14:08:15.163Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-6832'
references:
  - url: 'https://github.com/nesquena/hermes-webui/pull/409'
    label: Pull Request
  - url: 'https://github.com/nesquena/hermes-webui/pull/412'
    label: Pull Request
  - url: >-
      https://github.com/nesquena/hermes-webui/commit/3cc5839bf303fa6758bfdac538507407a2929655
    label: Patch Commit
  - url: 'https://github.com/nesquena/hermes-webui/releases/tag/v0.50.132'
    label: hermes-webui 0.50.132 Release Notes
  - url: 'https://github.com/nesquena/hermes-webui/releases/tag/v0.50.32'
    label: hermes-webui 0.50.32 Release Notes
  - url: >-
      https://www.vulncheck.com/advisories/nesquena-hermes-webui-arbitrary-file-deletion-via-unvalidated-session-id
tags:
  - cve.org
epss: 0.00475
epssPercentile: 0.41333
ingestedAt: '2026-11-08T14:51:22.263Z'
---

## Overview

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.

## Affected

- `hermes-webui < PR #409`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.