---
id: CVE-2026-73478
title: Incorrect Authorization vulnerability in Drupal Diff allows Forceful Browsing
summary: >-
  Incorrect Authorization vulnerability in Drupal Diff allows Forceful Browsing.
  This issue affects Diff versions: from 0.0.0 to 2.0.1, from 2.1.0 to 2.1.1.
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-863
vendor: diff_project
product: diff
affected:
  - diff < 2.0.1
  - 'diff >= 5.x-1.0, <= 5.x-2.1'
  - 'diff >= 6.x-1.0, <= 6.x-2.3'
  - 'diff >= 7.x-3.0, <= 7.x-3.5'
  - 'diff >= 8.x-1.0, <= 8.x-1.10'
  - diff = 2.1.0
  - diff = 4.7.x-1.1
patched:
  - diff 2.0.1
published: '2026-09-02'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T16:41:20.313'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73478'
references:
  - url: 'https://www.drupal.org/sa-contrib-2026-096'
    label: mlhess@drupal.org
tags:
  - nvd
epss: 0.00313
epssPercentile: 0.21582
ingestedAt: '2026-09-16T16:59:56.533Z'
---

## Overview

Incorrect Authorization vulnerability in Drupal Diff allows Forceful Browsing. This issue affects Diff versions: from 0.0.0 to 2.0.1, from 2.1.0 to 2.1.1.

## Affected

- `diff < 2.0.1`
- `diff >= 5.x-1.0, <= 5.x-2.1`
- `diff >= 6.x-1.0, <= 6.x-2.3`
- `diff >= 7.x-3.0, <= 7.x-3.5`
- `diff >= 8.x-1.0, <= 8.x-1.10`
- `diff = 2.1.0`
- `diff = 4.7.x-1.1`

## Remediation

Upgrade past the affected range:

- `diff 2.0.1`