Answer in brief
CVE-2026-75526 records a Medium severity (CVSS 4.4) vulnerability in django CMS: Stored XSS in edit-mode plugin exception rendering. The current sources do not mark it as known exploited. The current feed maps django-cms/django-cms (generic), django-cms (pip), django-cms (pypi). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 4.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps django-cms/django-cms (generic), django-cms (pip), django-cms (pypi). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| django-cms/django-cmsgeneric | >= 5.0.8, < 5.0.9 | Not reported |
| django-cmspip | >=5.0.8,<5.0.9 | 5.0.9 |
| django-cmspypi | >=5.0.8 <5.0.9 | 5.0.9 |
Published upstream
Aug 20, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 20, 2026
django CMS is an easy-to-use and developer-friendly enterprise content management system powered by Django. From 5.0.8 until 5.0.9, ContentRenderer.render_placeholder in cms/plugin_rendering.py can pass stored, attacker-controlled values to ContentRenderer.render_exception when plugin rendering fails in edit mode. Values from get_short_description(), the exception message, the placeholder, or placeholder.source are interpolated into a cms-rendering-exception heading and later returned through mark_safe. Because the heading is not escaped, stored HTML executes in an editor’s browser, and settings.DEBUG does not prevent the custom heading from rendering. The fix uses format_html to escape the message before safe placeholder output is returned. This issue is fixed in versions 5.0.9.
Quoted source text, attributed separately from HOL analysis.