---
id: CVE-2026-54263
aliases:
  - GHSA-23m2-mghx-vqmf
title: 'Wagtail: Reflected XSS in dynamic image URL generator view'
summary: 'Wagtail: Reflected XSS in dynamic image URL generator view'
severity: high
cvss: 7.3
cwe:
  - CWE-79
vendor: wagtail
product: wagtail
ecosystem: pip
affected:
  - 'wagtail >= 7.3, < 7.3.3'
  - 'wagtail >= 7.4, < 7.4.2'
patched:
  - wagtail 7.3.3
  - wagtail 7.4.2
published: '2026-08-20'
updated: '2026-08-20'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-23m2-mghx-vqmf'
references:
  - url: 'https://github.com/wagtail/wagtail/security/advisories/GHSA-23m2-mghx-vqmf'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-54263'
  - url: >-
      https://github.com/pypa/advisory-database/tree/main/vulns/wagtail/PYSEC-2026-616.yaml
  - url: 'https://github.com/advisories/GHSA-23m2-mghx-vqmf'
tags:
  - ghsa
  - pip
epss: 0.00204
epssPercentile: 0.10645
ingestedAt: '2026-08-20T18:59:54.416Z'
---

## Overview

### Impact

A reflected cross-site scripting (XSS) vulnerability exists on the dynamic image URL generator view within the Wagtail admin interface. A user with a limited-permission editor account for the Wagtail admin could craft a URL that, when viewed by a user with higher privileges, could perform actions with that user's credentials. The vulnerability is present for all sites, even if they do not enable the [dynamic image serve view](https://docs.wagtail.org/en/stable/advanced_topics/images/image_serve_view.html). The vulnerability is not exploitable by an ordinary site visitor without access to the Wagtail admin.

### Patches

Patched versions have been released as Wagtail 7.3.3 and 7.4.2.

### Workarounds

For sites that cannot easily upgrade to a current supported version, the vulnerability can be patched by adding the following code to `urls.py` URL pattern declarations to override the vulnerable view. This disables the admin dynamic image preview functionality, while the public-facing dynamic image serve view still works.

```python
from django.http import HttpResponseBadRequest
from django.urls import path
from wagtail.admin import urls as wagtailadmin_urls

def disabled_output(request, image_id):
    return HttpResponseBadRequest("", content_type="text/plain")

urlpatterns = [
    # Example where the CMS admin is at /admin/.
    # Add this before the Wagtail admin URLs registration, with the same sub-path.
    path("admin/images/<int:image_id>/generate_url/output/", disabled_output),
    path("admin/", include(wagtailadmin_urls)),
]
```

### Acknowledgements

Many thanks to Thibaud Colas (@thibaudcolas) for reporting this issue.

### For more information

If you have any questions or comments about this advisory:

- Visit Wagtail's [support channels](https://docs.wagtail.org/en/stable/support.html)
- Email us at [security@wagtail.org](mailto:security@wagtail.org) (view our [security policy](https://github.com/wagtail/wagtail/security/policy) for more information).

## Affected packages

- `wagtail >= 7.3, < 7.3.3`
- `wagtail >= 7.4, < 7.4.2`

## Remediation

Upgrade to a patched release:

- `wagtail 7.3.3`
- `wagtail 7.4.2`