Vulnerability · Published Aug 5, 2026 · Assigned by TuranSec

CVE-2026-71236Grocy - Stored XSS via HTMLPurifier Output Double-Decode

High 8.7

In plain English

A high-severity cross-site scripting in grocy from grocy. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities).

Severity (CVSS 3.1)8.7High

Exploit odds (30 days)0.4%top 70.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
grocy	grocy	0

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

References

https://github.com/grocy/grocy third-party-advisory