Vulnerability Description
Sulu is an open-source PHP content management system based on the Symfony framework. Prior to versions 2.6.25 and 3.0.8, src/Sulu/Bundle/MediaBundle/Controller/MediaStreamController.php allows the /media/{id}/download/{slug} route and its administration variant to honor the inline query parameter for scriptable MIME types. The vulnerable stored Content-Type values include text/html, application/xhtml+xml, text/xml, and application/xml. An attacker with media upload permission can store an HTML, XHTML, or XML document and create a link using inline=1, causing the application to return the file on the Sulu origin instead of forcing Content-Disposition attachment. When an authenticated victim opens the link, attacker-controlled JavaScript can execute with the victim's Sulu-origin session and can read data or perform actions as that victim. This issue is fixed in versions 2.6.25 and 3.0.8.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/sulu/sulu/commit/d061094f5b7bb1d5e974544fce30bede9c7adf8e
- https://github.com/sulu/sulu/releases/tag/2.6.25
- https://github.com/sulu/sulu/releases/tag/3.0.8
- https://github.com/sulu/sulu/security/advisories/GHSA-pp4x-ccxq-6r33
FAQ
What is CVE-2026-82396?
CVE-2026-82396 is a vulnerability with a CVSS score of 5.4 (MEDIUM). Sulu is an open-source PHP content management system based on the Symfony framework. Prior to versions 2.6.25 and 3.0.8, src/Sulu/Bundle/MediaBundle/Controller/MediaStreamController.php allows the /me...
How severe is CVE-2026-82396?
CVE-2026-82396 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-82396?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.