Answer in brief
CVE-2026-82396 records a Medium severity (CVSS 5.4) vulnerability in Sulu: Stored XSS via media download inline-disposition override. The current sources do not mark it as known exploited. The current feed maps sulu/sulu (composer), sulu/sulu (composer), sulu/sulu (generic). 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 5.4. 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 sulu/sulu (composer), sulu/sulu (composer), sulu/sulu (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| sulu/sulucomposer | <=2.6.24 | 2.6.25 |
| sulu/sulucomposer | >=3.0.0-alpha1,<3.0.8 | 3.0.8 |
| sulu/sulugeneric | < 2.6.25 || >= 3.0.0-alpha1, < 3.0.8 | Not reported |
Published upstream
Aug 31, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 31, 2026
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.
Quoted source text, attributed separately from HOL analysis.