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OpenAdvisories
High · 8.7 CVE-2026-71236 EUVD-2026-53309GHSA-c924-wcfj-cr8j

Grocy - Stored XSS via HTMLPurifier Output Double-Decode

Published Aug 5, 2026 · Updated Aug 10, 2026 · Assigned by TuranSec

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 &amp;lt;, &amp;gt;, and &amp;amp; back to <, >, and & immediately after purification.

Affected products

VendorProductAffectedFixed
grocy grocy — —

References