{"id":"CVE-2026-71236","published":"2026-08-05T11:16:26.377","lastModified":"2026-08-10T12:17:26.090","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.","cvssScore":8.7,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N","cwes":["CWE-79"],"vendors":[],"products":[],"references":[{"url":"https://github.com/grocy/grocy","tags":[]}],"exploitRefs":[{"url":"https://github.com/grocy/grocy","tags":[]}],"hasPoc":true,"ai":{"summary":"The flaw lies in the manual reversal of HTML entity encoding after purification with HTMLPurifier, potentially allowing for injection of malicious scripts.","exploitability":"Exploitation is moderately hard as it requires precise control over the input, but preconditions include the API being misconfigured to allow untrusted input.","blast_radius":"If exploited, this could lead to full remote code execution (RCE) on the server hosting the Grocy instance.","remediation":"Upgrade to the latest version of Grocy that addresses this issue, specifically version 3.2.0 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["rce","web","api","html-injection"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-30T09:25:47.903Z"}}