Vulnerabilities CVE-2026-71236

CVE-2026-71236

High

Open

TLP:CLEAR

Grocy - Stored XSS via HTMLPurifier Output Double-Decode

NVD CVE.org

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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.

Details

CVSS Score: 8.7
EPSS Score ⓘ: 0.20%

10th percentile
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Confidence: 90%
Published: Aug 5, 2026
Last Modified: Aug 10, 2026

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