CVE-2026-75526: django-cms · Cross-site Scripting
Affects django-cmsSource GCVE Database
Not known to be exploited · CVSS 4.4 Medium : upgrade to 5.0.9 when convenient.
Data as of 26 Oct 2026, 17:16 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 17% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 5.0.9
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 20 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade django-cms to 5.0.9.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| django-cms django-cms | Affected
| Fixed in
|
Description
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.
References
- github.com/django-cms/django-cms/security/advisories/GHSA-hvq6-2r72-p2x7 (opens in a new tab)
- github.com/django-cms/django-cms/pull/8711 (opens in a new tab)
- github.com/django-cms/django-cms/commit/b56a568844ff3702495945f73a31d0868285bf88 (opens in a new tab)
- github.com/django-cms/django-cms/releases/tag/5.0.9 (opens in a new tab)