CVE-2026-71236
Grocy - Stored XSS via HTMLPurifier Output Double-Decode
- State
- Published
- Severity
- 8.7 High
- Published
- Aug 5, 2026
- Updated
- Aug 10, 2026
- Reserved
- Aug 5, 2026
Description
Grocy's API request-body parser (controllers/Api/BaseApiController.php, GetParsedAndFilteredRequestBody) purifies incoming field values with HTMLPurifier, then manually reverses HTML-entity encoding of the resulting output by replacing &lt;, &gt;, and &amp; back to <, >, and & immediately after purification.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 8.7 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N | TuranSec |
Weaknesses
- CWE-79 Cross-site Scripting
Affected Products
| Product | Versions |
|---|---|
grocygrocy |
|
References
- https://github.com/grocy/grocythird-party-advisory
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