CVE-2026-71236
8.7 HIGHpublic exploit availablePublished 2026-08-05 · Updated 2026-08-10
AI risk analysis
- 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.
- Detection
- No reliable host or network indicator is derivable from the published description.
- Prioritized remediation
- Upgrade to the latest version of Grocy that addresses this issue, specifically version 3.2.0 or later.
rcewebapihtml-injection
Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.
NVD 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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Weaknesses
CWE-79
Public exploit & PoC references
All references
Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.
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